This request specifies several reverses direction and returns to service the leftover pieces of information: (1) type of 110 operation, (2) address requests on its way to the other end. Pizza connection 1 0 6739 21013 download free. In practical systems the of disk (drive, cylinder, surface, block), (3) address of head is moved as far as the last request in each direction. Vitamin r 2 20 – personal productivity tool. To display disk usage statistics with graph press d. Here the disk latency is between 16 - 32 milliseconds. 2.17 1.58 0.91 4/630 6711 PID COMM D MAJ MIN DISK I. Minecraft full version online game.
Disk Graph 2 1 325
Quizlet flash cards for ap physics cereal_studier --- A spacecraft is placed in a circular orbit around a planet with mass 6.4 x 1023 kg. The spacecraft orbits at a height of 4.5 x 107 m above the planet’s surface. What additional information is needed to calculate the speed of the spacecraft in the orbit?ANo additional informationBThe planet’s radius onlyCThe spacecraft’s mass onlyDBoth the planet’s radius and the spacecraft’s mass : BThe planet’s radius only --- A bus is initially traveling north at a constant speed, as shown in the figure above. As the bus starts to make a left turn without changing speed, a passenger notices that a box on the floor starts sliding toward the right side of the bus. Which of the following top views of the box, when correctly labeled, would best represent all of the horizontal forces exerted on the box as it starts sliding?Abox with arrow pointing to the rightBbox with arrow pointing to the leftCbox with arrow point : Bbox with arrow pointing to the left --- A steel ball supported by a stick rotates in a circle of radius r, as shown above. The direction of the net force acting on the ball when it is in the position shown is indicated by which of the following? : .. --- Three objects can only move along a straight, level path. The graphs below show the position d of each of the objects plotted as a function of time t.The sum of the forces on the object is zero in which of the cases?AII onlyBIII onlyCI and II onlyDI and III only : CI and II only --- In a lab, a block weighing 80 N is attached to a spring scale, and both are pulled to the right on a horizontal surface, as shown above. Friction between the block and the surface is negligible. What is the acceleration of the block when the scale reads 32 N?A2.0 m/s2B2.5 m/s2C4.0 m/s2D6.0 m/s2E8.0 m/s2 : C4.0 m/s2 --- A spaceship is traveling from Earth to the Moon. Which of the following is true of the gravitational force on the ship due to the two objects when the ship is equidistant from Earth and the Moon?AThere is no net force because the ship is beyond the influence of Earth and the Moon.BThere is no net force because the forces exerted by Earth and the Moon balance.CThere is a net force because the force exerted by Earth is smaller than that exerted by the Moon.DThere is a net force because the : DThere is a net force because the force exerted by Earth is greater than that exerted by the Moon. --- An object starts from rest and slides with negligible friction down an air track tipped at an angle θ from the horizontal. A student records values of the object’s position along the track at various times. The value of θ can best be determined from which of the following?AThe y-intercept of a graph of position as a function of timeBThe y-intercept of a graph of position as a function of the square of timeCThe slope of a graph of position as a function of timeDThe slope of a graph of pos : DThe slope of a graph of position as a function of the square of time --- Planet 1 orbits Star 1 and Planet 2 orbits Star 2 in circular orbits of the same radius. However, the orbital period of Planet 1 is longer than the orbital period of Planet 2. What could explain this?AStar 1 has less mass than Star 2.BStar 1 has more mass than Star 2.CPlanet 1 has less mass than Planet 2.DPlanet 1 has more mass than Planet 2.EThe masses of the planets are much less than the masses of the stars. : AStar 1 has less mass than Star 2. --- A 100 kg cart goes around the inside of a vertical loop of a roller coaster. The radius of the loop is 3 m and the cart moves at a speed of 6 m/s at the top. The force exerted by the track on the cart at the top of the loop isA200 NB800 NC1000 ND1200 NE2200 N : A200 N --- A 50.0 N box is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.50, and the coefficient of kinetic friction is 0.30. A horizontal 20.0 N force is then exerted on the box. The magnitude of the acceleration of the box is most nearlyA0 m/s2B0.5 m/s2C1.0 m/s2D4.0 m/s2 : A0 m/s2 --- An object of mass m is initially at rest and free to move without friction in any direction in the xy-plane. A constant net force of magnitude F directed in the x direction acts on the object for 1 s. Immediately thereafter a constant net force of the same magnitude F directed in the y direction acts on the object for 1 s. After this, no forces act on the object.Which of the following vectors could represent the velocity of the object at the end of 3 s, assuming the scales on the x and y axes : .. --- A ball of mass m is attached to a vertical rod by two massless strings. The rod is rotated about its axis so that both strings are taut, with tensions T1 and T2, respectively. The strings and rod form the right triangle shown in the figure above. The ball rotates in a horizontal circle of radius r with speed v.What is the magnitude of the net force on the ball?Amv2 / rBmgCT2DT2 mv2rET1 mg : Amv2 / r --- *4k block on a table tied to a 2k block hanging off the table with a pulley system*The system shown above is released from rest. If friction is negligible, the acceleration of the 4.0 kg block sliding on the table shown above is most nearlyA0B1.7 m/s2C3.3 m/s2D5.0 m/s2E10.0 m/s2 : C3.3 m/s2 --- The stacks of boxes shown in the figure above are inside an elevator that is moving upward. The masses of the boxes are given in terms of the mass M of the lightest box.How does the magnitude of the force exerted by the top box on the bottom box compare with the magnitude of the force exerted by the bottom box on the top box for each of the stacks?AThe two magnitudes are always equal in each of the stacks.BThe two magnitudes are always different in each of the stacks.CThe two magnitudes a : AThe two magnitudes are always equal in each of the stacks. --- The stacks of boxes shown in the figure above are inside an elevator that is moving upward. The masses of the boxes are given in terms of the mass M of the lightest box.Assume the elevator has upward acceleration a, and consider the stack that has two boxes of mass M. What is the magnitude of the force exerted on the top box by the bottom box?AMgBMaCM(a - g)DM (a g) : DM (a g) --- The toy car shown in the figure above enters the vertical circular loop with an initial velocity and moves completely around the loop without friction. If the car has no means of self-propulsion, which of the following is true of the car’s acceleration at the instant it is at point P ?AIt is vertically upward.BIt is in the direction of the velocity.CIt is directly toward the center of the circle.DIt has components both downward and toward the center of the circle.EIt has components bot : DIt has components both downward and toward the center of the circle. --- A rocket lifts a payload upward from the surface of Earth. The radius of Earth is R, and the weight of the payload on the surface of Earth is W. The force of Earth : B√2R --- A small cart is rolling freely on an inclined ramp with a constant acceleration of 0.50 m/s2 in the -x direction. At time t = 0, the cart has a velocity of 2.0 m/s in the x-direction. If the cart never leaves the ramp, which of the following statements correctly describes the motion of the cart at a time t : DThe cart is traveling in the –x-direction and is speeding up. --- The graph above shows velocity v as a function of time t for a 0.50 kg object traveling along a straight line. The graph has three segments labeled 1, 2, and 3. A rope exerts a constant force of magnitude FT on the object along its direction of motion the whole time. During segment 2 only, a frictional force of magnitude Ff is also exerted on the object.Which of the following expressions correctly relates the magnitudes Ff and FT?AFf : CFT --- A small car with mass m and speed 2v and a large car with mass 2m and speed v both travel the same circular section of an unbanked road. If the frictional force required to keep the small car on the road without skidding is F, then the frictional force required to keep the large car on the road without skidding isA4FB2FCFDF/2EF/4 : DF/2 --- The Atwood : .. --- An experiment is conducted such that an applied force is exerted on a 5kg object as it travels across a horizontal surface in which frictional forces are NOT considered to be negligible. A graph of the net force exerted on the object as a function of the object’s distance traveled is shown. How could a student use the graph to determine the net work done on the object?AMultiply the average value of the applied force by the total distance the object traveled.BMultiply the slope of the best fi : DThere is not enough information that is known or can be obtained from the graph to determine the net work done on the object. --- A block of mass M is sliding with an initial speed vi along a horizontal surface with negligible friction. A constant force of magnitude FA is exerted on the object at an upward angle of 60∘ from the horizontal, causing the object to speed up. If the block remains in contact with the floor, what is the change in the block’s kinetic energy as it moves a horizontal distance Δx ?A1/2FAΔxBFAΔxC1/2Mv2i 1/2FAΔxD1/2Mv2i FAΔx : A1/2FAΔx --- A student conducts an experiment in which an object is released from rest and falls to the floor. In the experiment, frictional forces CANNOT be neglected. The student uses experimental data to create two graphs. Figure 1 is a graph of kinetic energy of the object as a function of time. Figure 2 is a graph of the object-Earth system’s gravitational potential energy as a function of time. How should the student use one or both graphs to determine how much the total mechanical energy changes after : DCalculate the magnitude of the difference between the final kinetic energy of the object found from the graph in Figure 1 and the initial gravitational potential energy of the object-Earth system found from the graph in Figure 2. --- A student performs an experiment in which a 4kg object travels across a horizontal surface with an initial speed velocity of 6m/s and a 2kg object travels across a horizontal surface with an initial speed velocity of −3m/s. The objects travel toward each other and collide. Data collected from the experiment were used to create the velocity versus time graph shown that contains information about both objects before and after the collision. The positive direction is considered to be to the right. : DThe velocity of the center of mass of the two-object system remains constant during the experiment. --- Cart X of mass m0 travels along a horizontal surface with a constant speed in the positive horizontal direction. Cart X then collides with cart Y of mass M0, which was initially at rest. After the collision, cart Y has a positive velocity. Immediately after the collision, cart X and cart Y could have one of three final velocities that are indicated in the table. In all scenarios, the total momentum of the two-cart system is the same before and after the collision.Assume that the collision in ea : DΔp3 --- Graphs I , II , and III that are shown represent momentum versus time graphs for three possible cases in which a collision could occur between two carts. Which of the momentum versus time graphs are possible representations of one of the three scenarios if the system is closed?AGraphs I and II onlyBGraphs I and III onlyCGraphs II and III onlyDGraphs I, II, and III : BGraphs I and III only --- Block X of mass 2kg and block Y of unknown mass travel toward each other. An elastic collision occurs in which momentum is conserved. The graph shows the velocity of block X and of velocity of block Y as a function of time before, during, and after the collision. What is the mass of block Y?A0.4kgB2kgC6kgD30kg : C6kg --- A student must conduct an experiment in which a block is pulled across a horizontal surface by a spring scale so that a nonzero change in momentum of the block can be determined for a specific time interval. The student also has access to measuring tools that are found in a typical physics laboratory. Which of the following experiments could the student conduct to determine the change in momentum of the cart? Select two answers.AAttach the spring scale to the block, and pull the block at a con : BAttach the spring scale to the block, and pull the block so that its speed increases as it travels across the horizontal surface. Record the force that the spring scale exerts on the block. Use a stopwatch to determine the time that the block is in motion.CAttach the spring scale to the block, and pull the block so that its speed increases as it travels across the horizontal surface. Use the motion detector to record the speed of the block at the beginning of the time interval and at the end --- Block X of mass m0 is at rest at the top of a ramp, and the block’s center of mass is at a height H1 above the ground. Block X is then released from rest, and it slides down the ramp and collides with block Y of mass m0, which is initially at rest and has its center of mass at a height h above the ground. At the moment before the collision, block X has a speed of v0. After the collision, block Y travels such that it lands at point P.Consider the scenario in which block X is released from rest a : BThe horizontal distance will be greater for block Y when block X is released from height H1. --- A 2 kg object is released from rest near and above Earth : .. --- Objects X and Y are connected by a string of negligible mass and suspended vertically over a pulley of negligible mass, creating an Atwood’s machine, as shown in the figure. The objects are initially at rest, and the mass of Object Y is greater than the mass of Object X. As Object Y falls, how does the gravitational potential energy of the Object X-Object Y-Earth system change? All frictional forces are considered to be negligible.AThe gravitational potential energy increases because the cente : DThe gravitational potential energy decreases because the center of mass of Object XX and Object YY moves downward. --- Object X of mass m0 travels to the right with a velocity v0. Object Y of mass 2m0 moves to the left at 2v0, as shown in the figure. The objects collide and then stick together. What is the change in kinetic energy of the two-object system from immediately before the collision to immediately after the collision?AThe kinetic energy increases by 6m0v20BThe kinetic energy increases by 3m0v20CThe kinetic energy decreases by 6m0v20DThe kinetic energy decreases by 3m0v20 : DThe kinetic energy decreases by 3m0v20 --- A planet moves in an elliptical orbit around a star, as shown in the diagram. Which of the following is true as the planet moves from position 1 to position 2?AThe planet loses kinetic energy due to negative gravitational work; thus, the total energy in the planet-star system decreases.BThe planet’s kinetic energy increases due to positive gravitational work; thus, the total energy in the planet-star system increases.CKinetic energy decreases and gravitational potential energy increases, b : CKinetic energy decreases and gravitational potential energy increases, but the total energy in the planet-star system stays constant. --- A force probe is used to push a box across a smooth surface, as shown in the figure. Frictional forces are considered to be negligible. The force probe collects data about the force exerted on the box as a function of time. The data are used to create the graph that is shown. During which time interval does the box experience the greatest change in its momentum?A0s to 2sB2s to 4sC4s to 6sDThe change in momentum is the same for each interval of time. : C4s to 6s --- A 2 kg block is placed at the top of an incline and released from rest near Earth’s surface and unknown distance H above the ground. The angle θ between the ground and the incline is also unknown. Frictional forces between the block and the incline are considered to be negligible. The block eventually slides to the bottom of the incline after 0.75 s. The block’s velocity v as a function of time t is shown in the graph starting from the instant it is released. How could a student use the graph to : BUse 1/2mv2f with m=2 kgm=2 kg and vf equal to the final velocity of the object that can be found from the graph. --- A block of known mass M is at rest at the base of a ramp. A second identical block of mass M travels at a known, constant velocity v0, as shown in Figure 1. The block that travels at a constant speed collides with and sticks to the first block. Both blocks slide up the ramp and travel with an unknown velocity vR at the top of the ramp, as shown in Figure 2. All frictional forces are considered to be negligible. Which quantity should the student measure, if any, to determine whether the conservat : DThe velocity vRvR of the two-block system at the top of the ramp, because this can be used to determine the final momentum of the system. --- Object X travels across a horizontal surface and collides with object Y. The velocity as a function of time for object X and object Y before, during, and after the collision is shown in the graph. Both objects have a mass of 2kg. Which of the following correctly describes the momentum p⃗ of the system and the kinetic energy K of the system?Ap------------KConserved ConservedBp--------------KConserved Not conservedCp------------------KNot conserved ConservedDp-----------------KNot cons : Bp--------------KConserved Not conserved --- Two blocks of the same mass but made of different material slide across a horizontal, rough surface and eventually come to rest. A graph of the kinetic energy of each block as a function of position along the surface is shown. Which of the following is a true statement about the frictional force Ff that is exerted on the two blocks?AFf2=2Ff1, since the force of friction is represented as the slope for each of the two curves.BFf2=1/2Ff1, since the force of friction is represented as the inver : AFf2=2Ff1, since the force of friction is represented as the slope for each of the two curves. --- Cart A with a mass of 2.0kg travels at a constant speed of 3.0ms to the right on a horizontal surface, as shown in the figure. Cart A then collides with cart B with a mass of 1.5kg that is initially at rest. The force F exerted on cart B by cart A as a function of time t is shown in the graph, where t=0s is the instant of initial contact between the carts. As a result of the collision, cart B moves to the right with a speed of 3.2ms. All frictional forces are considered to be negligible. A stude : CEquation 1 and equation 2, because the system is closed and all quantities are known except for the final speed of cart A. --- An object of mass M is attached to a string of negligible mass and spun in a vertical circle of radius R, as shown in the figure above. As the object : D2MgR --- In an experiment, a spring is placed between object X and object Y. Object X has twice the mass of object Y, which has mass M. The two objects are pushed together until the spring is at its maximum compression, as shown in the figure. The objects are released from rest, and data are collected for the speed of each object immediately after the spring is no longer compressed. However, the graph does not indicate which object corresponds to a given velocity, and the positive direction is not indica : BObject X travels at −2ms and object Y travels at 4ms after the spring is no longer compressed. --- A cart of mass 1kg travels along a horizontal, frictionless surface. A net force is applied to the cart. A graph of the net force applied to the cart as a function of time is shown. The initial and final direction of the cart and the direction of the net force exerted on the cart is unknown. The distance of one grid unit represents a change in velocity of 1 ms. Which of the following diagrams could represent the direction and relative magnitude of the velocity of the cart before the force is app : .. --- The surface of an incline is coated with an experimental substance that is intended to reduce the frictional force between a block and the surface of the incline. A 2 kg block is placed at the top of the incline at a height of 1.8 m, as shown in the figure. After the block is released from rest, the block slides down the incline and a motion detector at the bottom of the incline measures the block’s speed as 5.8ms after the block is no longer on the incline. Which of the following claims is corr : BThe experimental substance did not reduce all the frictional force because some of the gravitational potential energy of the Earth-block system at the top of the incline was converted into nonmechanical energy. --- A person starting from rest at point 1 swings along a circular arc from a rope, as shown above. Point 2 is at a lower height than point 1. What is the trajectory of the person when the person lets go of the rope at Point 2 ? : .. --- An axle passes through a pulley. Each end of the axle has a string that is tied to a support. A third string is looped many times around the edge of the pulley and the free end attached to a block of mass mb , which is held at rest. When the block is released, the block falls downward. Consider clockwise to be the positive direction of rotation, frictional effects from the axle are negligible, and the string wrapped around the disk never fully unwinds. The rotational inertia of the pulley is 12M : BRmbgt0 --- An axle passes through a pulley. Each end of the axle has a string that is tied to a support. A third string is looped many times around the edge of the pulley and the free end attached to a block of mass mb , which is held at rest. When the block is released, the block falls downward. Consider clockwise to be the positive direction of rotation, frictional effects from the axle are negligible, and the string wrapped around the disk never fully unwinds. The rotational inertia of the pulley is 12M : .. --- A horizontal disk is at rest on top of an axle, and the friction between the disk and axle is not negligible. In experiment 1, an applied torque is exerted to the edge of the disk for 2s. At that moment, the applied torque is removed, and the disk eventually comes to rest as a result of a frictional torque. Graphs of the disk : .. --- A student conducts an experiment in which the angular velocity of a rotating object about a central axis of rotation changes as a function of time, as shown by the graph. The student makes the following claim.“The net torque responsible for the rotation of the object changes direction at approximately 5.0s.”Which of the following statements is correct about the student’s evaluation of the data from the graph? Justify your selection.AThe student is correct, because the angular velocity cannot : CThe student is incorrect, because the angular acceleration of the object remains constant. --- One end of a string is attached to a 0.1kg object. The string is wrapped around a pulley of known rotational inertia and radius 0.5m that may rotate about its central axis. The central axis is supported by strings that are connected to the ceiling, as shown in Figure 1. In an experiment, the 0.1kg object is released from rest, and the necessary data are collected to graph the distance fallen by the object as a function of the square of the time fallen, as shown in Figure 2. A student makes the f : AThe student is correct, because the linear acceleration of the 0.1kg0.1kg object can be determined from the graph. The angular acceleration of the pulley can then be determined. The direction of the net torque will be in the direction of the angular acceleration. --- A graph of the angular velocity ω as a function of time t is shown for an object that rotates about an axis. Three time intervals, 1-3, are shown. Which of the following correctly compares the angular displacement Δθ of the object during each time interval?AΔθ1=Δθ3 : BΔθ2 --- In an experiment, students must determine the angular momentum of a vertically rotating nonuniform disk of diameter 1.0m. A central axle of negligible friction is located at the center of the disk and is oriented perpendicular to the plane of the page. A string is wound around the disk, and an object of unknown mass is attached to the string, as shown in Figure 1. The object is released from rest, which causes the disk to rotate as the object falls. The disk : BUse ΔL=τΔt, where τ=rFsinθ with r=0.5m, F=5N, and θ=90o. --- A rod of length 2D0 and mass 2M0 is at rest on a flat, horizontal surface. One end of the rod is connected to a pivot that the rod will rotate around if acted upon by a net torque. A lump of clay of mass m0 is launched horizontally toward the center of the rod with velocity v0, as shown in the figure. After the clay collides with the rod, the clay sticks to the rod and both objects rotate around the pivot with the common angular velocity ωf. The rotational inertia of the clay-rod system is Is. W : Am0v0D0=Isωf, because the clay hits the rod a distance D0 from the pivot. --- An object revolves around a central axis of rotation. The motion of the object is described by the following equation.ω2=(10rad/s)2−(4rad/s2)θWhich two of the following graphs correctly shows the angular motion of the object? Select two answers. : .. --- A system consists of a horizontal rod and two small objects, as shown. The horizontal rod has a total length 2l0 and mass M, with rotational inertia IR=Ml23. Each object has a mass m0 and a rotational inertia IO=m0r2 where r is the distance from the object to the axle. The objects are fixed to the rod at the positions shown in the figure. The system is initially at rest, and a net torque is exerted on the system until it rotates with an angular speed, ω0 about the vertical axis shown, which is t : D(Ml^2/3 m0(34l^20/25))ω0 --- A lump of clay of mass mclay with speed vclay=8 m/s travels toward various spheres that are suspended from the ceiling by lightweight strings of different lengths, as shown in the figure. For the three scenarios, the clay collides with the suspended sphere and sticks to it. Which of the following correctly relates the angular momentum L of the clay-bob system immediately after the collision for each scenario, where the angular momentum is taken about the point where the string is attached to the : DL1 --- AMgL0/2BMgLCMgL0sin(θ0)/2DMgL0sin(θ0) : AMgL0/2 --- Disk X is held at rest above disk Y, which rotates with angular velocity ω0 about its center, as shown in the figure. Disk Y is slowly lowered onto disk X until the disks remain in contact and travel together at angular velocity ω1. Which of the following linear collisions is analogous to the rotational collision that is described?ABlock X travels toward block Y with velocity v1. Block Y is initially at rest. After the collision, block Y travels with velocity v1, and block X remains at res : BBlock X travels toward block Y with velocity v1. Block Y is initially at rest. After the collision, block X and block Y travel together with velocity v2. --- A rod is at rest on a flat, horizontal surface. One end of the rod is attached to a pivot, and the rod may freely rotate around the pivot if acted upon by a net external torque, as shown in Figure 1. In an experiment, the rod is initially at rest and student exerts a net torque on the rod. Data are collected to create a graph of the rod : BDetermine the area bound by the curve and the horizontal axis from 0 s to 5 s and multiply the result by the rotational inertia of the rod. --- Each object of mass m0 is placed a distance r2 away from the center of the platform such that both masses are on opposite sides of the platform. Distance r2 : CCalculate the slope of a graph of the change in angular momentum versus the product of the net torque and the time interval and determine if the slope is equal to one. --- Each object of mass m0 is placed a distance r2 away from the center of the platform such that both masses are on opposite sides of the platform. Distance r2 : BL ωL1=L2 ω1 --- The figure above represents a stick of uniform density that is attached to a pivot at the right end and has equally spaced marks along its length. Any one or a combination of the four forces shown can be exerted on the stick as indicated.All four forces are exerted on the stick that is initially at rest. What is the angular momentum of the stick after 2.0s ?A150 kg⋅m2sB450 kg⋅m2sC650 kg⋅m2sD750 kg⋅m2s : A150 kg⋅m2s --- Two boxes are tied together with a string. They are thrown onto a layer of ice such that they spin around their center of mass C as they slide horizontally across the icy surface, as shown in the figure. The system has an angular momentum L⃗ 0 and an angular velocity ω⃗ 0 at a time t=0s. A graph of the two-block system : AL0=L4 and ω0=ω4 --- A disk-shaped platform has a known rotational inertia ID. The platform is mounted on a fixed axle and rotates in a horizontal plane with an initial angular velocity of ωD in the counterclockwise direction, as shown. After an unknown time interval, the disk comes to rest. A single point on the disk revolves around the center axle hundreds of times before the disk comes to rest. Frictional forces are considered to be constant.A student must determine the angular impulse that frictional forces exe : DNo additional data are necessary, because the rotational inertia of the disk and its initial angular velocity are known. --- The center of mass of a uniform meterstick is placed on a fulcrum. Two objects of known mass, m1 and m2, are hung at known positions on the meterstick. One end of a string is attached to one end of the meterstick, and the other end of the string is looped around a pulley and connected to hanging object X of unknown mass, as shown in the figure. The meterstick does not rotate and is level with the horizontal. Which of the following measuring devices, if any, should be used to make measurements to : DNo additional equipment or measurements are needed, because the force due to gravity exerted on objects m1 and m2 and the distance between where the force is applied and the tip of the fulcrum are already known. --- A solid disk rests on a central axle. A string is wound around the disk, which causes the disk to rotate about its axle when pulled with a constant force FP, as shown in Figure 1. The force is exerted on the string until the string completely unwinds and detaches from the disk at time t=2s. A graph of the net torque as a function of time is shown in Figure 2. How can a student determine what the change in angular momentum of the disk would be between 0s and 2s if friction were negligible? Justif : CThe net torque exerted on the disk during the time interval 0 s --- A cart with a toy projectile launcher attached to its top travels forward at a constant speed v0. The launcher fires a solid sphere forward at a speed much greater than that of the cart-launcher system. The cart : CA child on the edge of a large rotating disk throws a ball in the same direction as the child --- Planet X is in a stable circular orbit around a star, as shown in the figure. Which of the following graphs best predicts the angular momentum of the planet as a function of its horizontal position from point A to point B if the planet is moving counterclockwise as viewed in the figure above? : .. --- A uniform, rigid rod of length 2m lies on a horizontal surface. One end of the rod can pivot about an axis that is perpendicular to the rod and along the plane of the page. A 10N force is applied to the rod at its midpoint at an angle of 37°. A second force F is applied to the free end of the rod so that the rod remains at rest, as shown in the figure. The magnitude of the torque produced by force F is most nearlyA3.0N⋅mB6.0N⋅mC8.0N⋅mD12.0N⋅m : B6.0N⋅m --- Two identical disks rotate about their centers in opposite directions with the same magnitude of angular speed ω0. The top disk is dropped onto the bottom disk, as shown in the figure, so they collide and stick together. Which of the following predictions is correct about the motion of each individual disk after the collision?AEach disk will spin with the same final angular velocity ωf where ωf=0.BEach disk will spin with the same final angular velocity ωf where ωf : AEach disk will spin with the same final angular velocity ωf where ωf=0. --- An object is released from rest near a planet : -10m --- A lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. After several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. As the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. The lion and the gazelle eventually each reach constant but different speeds. Which of the following sets of graphs s : .. --- A kitten sits in a lightweight basket near the edge of a table. A person accidentally knocks the basket off the table. As the kitten and basket fall, the kitten rolls, turns, kicks, and catches the basket in its claws. The basket lands on the floor with the kitten safely inside. If air resistance is negligible, what is the acceleration of the kitten-basket system while the kitten and basket are in midair? : The acceleration is directed downward with magnitude equal to g because the system is a projectile. --- A rock of mass m is thrown horizontally off a building from a height h, as shown above. The speed of the rock as it leaves the thrower : √2h/g --- A student wants to investigate the motion of a ball by conducting two different experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the student releases a ball from rest and uses a slow-motion camera to film the ball as it falls to the ground. Using video analysis, the student is able to plot the ball : Since the balls have the same vertical position at any given time, they reach the ground at the same time. --- A student wants to investigate the motion of a ball by conducting two different experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the student releases a ball from rest and uses a slow-motion camera to film the ball as it falls to the ground. Using video analysis, the student is able to plot the ball : 5.4 m/s --- A car goes from rest to 30 m/s in 12 s with constant acceleration. How long does it take the car to go from rest to 15 m/s with the same acceleration? : 6.0s --- The graphs above represent the position x, velocity v, and acceleration a as a function of time t for a marble moving in one dimension. Which of the following could describe the motion of the marble? : Rolling up a ramp and then rolling back down --- A student wants to study the motion of an object that has a constant acceleration. Which of the following experiments could the student conduct to provide the best situations in which an object has a constant acceleration? Select two answers. : Release a ball from rest near Earth --- A block is projected up a frictionless plane with an initial speed vo. The plane is inclined 30° above the horizontal. What is the approximate acceleration of the block at the instant that it reaches its highest point on the inclined plane? : 5 m/s^2 down the incline --- A person driving a car suddenly applies the brakes. The car takes 4 s to come to rest while traveling 20 m at constant acceleration. Can the speed of the car immediately before the brakes were applied be determined without first determining the car : Yes, by determining the average speed while braking and doubling it. --- A student wants to launch a toy dart toward a target that hangs from a light string. At time t=0, the dart is launched with an initial speed v0at an angle θ0 above the horizontal ground. At the instant the dart is launched, the string is cut such that the target begins to fall straight down. The positive horizontal direction is considered to be to the right, and the positive vertical direction is considered to be up.Figure 1 shows a displacement-versus-time graph for the dart. Figure 2 shows a : Dart: Vertical// Target: Vertical --- A student wants to launch a toy dart toward a target that hangs from a light string. At time t=0, the dart is launched with an initial speed v0at an angle θ0 above the horizontal ground. At the instant the dart is launched, the string is cut such that the target begins to fall straight down. The positive horizontal direction is considered to be to the right, and the positive vertical direction is considered to be up.A student makes the necessary measurements to create the graph shown, which re : Find twice the area under the curve for the dart --- A student wants to launch a toy dart toward a target that hangs from a light string. At time t=0, the dart is launched with an initial speed v0at an angle θ0 above the horizontal ground. At the instant the dart is launched, the string is cut such that the target begins to fall straight down. The positive horizontal direction is considered to be to the right, and the positive vertical direction is considered to be up.Which of the following graphs could represent the vertical component of the ve : .. --- A cart is constrained to move along a straight line. A varying net force along the direction of motion is exerted on the cart. The cart : aCD --- A cart is constrained to move along a straight line. A varying net force along the direction of motion is exerted on the cart. The cart : AB --- Two students want to determine the speed at which a ball is released when thrown vertically upward into the air. One student throws the ball into the air while the other student measures the total time that the ball is in the air. The students use a meterstick to measure the release height of the ball. Which of the following equations should the students use to determine the speed at which the ball was released? : Use y=y0 vy0t 12ayt2 from the moment in time in which the ball was released to the moment in time in which the ball hits the ground. --- Object A is released from rest at height h. At the same instant, object Bis thrown downward from the same location. Which of the following graphs of speed of v as a function of time t is correct for the two objects? : .. --- A ball is released from rest from the twentieth floor of a building. After 1 s, the ball has fallen one floor such that it is directly outside the nineteenth-floor window. The floors are evenly spaced. Assume air resistance is negligible. What is the number of floors the ball would fall in 3s after it is released from the twentieth floor : 7 to 10 floors --- The diagram above shows the forces exerted on an object. Which of the following dot diagrams best represents the position of the object at equal time intervals? : .. --- A planet has two moons, Moon A and Moon B, that orbit at different distances from the planet : The gravitational force exerted from the planet on Moon A is eight times larger than the gravitational force exerted from the planet on Moon B . --- A planet has two moons, Moon A and Moon B, that orbit at different distances from the planet : The distance between the center of each moon and the planet. --- An object is released from a large height above the ground and takes a very long time to reach the ground. The only forces exerted on the object are the force of Earth : It is initially zero and increases until it is equal to the force of gravity. --- During an experiment, a block of mass M=0.20kg is placed on a disk that rotates about an axle through its center, as shown in the diagram. The block is moved to different distances R from the axle, and the tangential speed of the block is gradually increased until the mass begins to slip. The distance and maximum tangential speed before slipping, vmax, are recorded. A student creates a graph of vmax2 as a function of R, as shown. How should the student use the graph to most accurately determine : Determine the slope of the best fit line and set it equal to μSgμSg.