Physics 1: Unit 5 Progress Check: MCQ Part B Questions and complete Answers

Document Content and Description Below

Block X of mass M slides across a horizontal surface where friction is negligible. Block X collides with block Y of mass 2M that is initially at rest, as shown in Figure 1. After the collision, both b... locks slide together with a speed vs , as shown in Figure 2. correct answers 9/2Mv^2 What is the speed of the center of mass of the two-block system immediately before the collision? correct answers The speed is v. How could a student verify that the collision under consideration is an inelastic collision for the two-block system? correct answers By comparing the final kinetic energy of the system with the initial kinetic energy of the system Block X of mass M travels with a speed v0. Block Y of mass 2M travels with a speed 2v0. Both blocks travel toward each other and collide. After the blocks collide, they separate so that the kinetic energy of the system remains conserved. Which of the following equations for the conservation of momentum could a student use to help determine the speed vf of each block after the collision? correct answers m0v0−4m0v0=m0vXf+2m0vYf, because the two blocks initially travel in opposite directions, and the blocks do not stick after the collision. Block X and block Y travel toward each other along a horizontal surface with block X traveling in the positive direction. Block X has a mass of 4kg and a speed of 2ms. Block Y has a mass of 1kg and a speed of 1 ms. A completely inelastic collision occurs in which momentum is conserved. What is the approximate speed of block X after the collision? correct answers 1.4 m/s Block X and block Y travel toward each other along a horizontal surface with block X traveling in the positive direction. Block X has a mass of 2kg and a speed of 3m/s. Block Y has a mass of 1kg and a speed of 3m/s. After the collision, block X travels in the horizontal direction with a speed of 1m/s in the negative direction. What is the speed of block Y if the collision is elastic? correct answers 5 m/s Cart X travels in the positive direction along a horizontal surface, and cart Y travels in the positive direction. The carts collide, and a student collects data about the carts' velocities as a function of time before, during, and after a collision, as shown. The masses of both objects are known. Which of the following best indicates how the student should use the graph to determine whether the collision is elastic or inelastic and provides a correct justification? correct answers Using the known mass and known velocity for each cart to determine the kinetic energy of the system before and after the collision, because the kinetic energy changes in an inelastic collision In an experiment, two objects, Object X and Object Y, travel toward each other and collide. Data are collected about each object before, during, and after the collision to create a graph that shows the momenta of Object Xand Object Y [Show More]

Last updated: 1 year ago

Preview 1 out of 1 pages