AP PHSICS 1 : UNIT 5 PROGRESS CHECK MCQ PART B QUESTIONS AND CORRECT SOLUTIONS 2024/2025 GRADED A+.

1.Block X of mass M slides across a horizontal surface where friction is negligible. Block X collides with blockY of mass 2M that is initially at rest, as shown in Figure 1. After the collision, both blocks slide together with a speed vs , as shown in Figure 2.: 9/2Mv^2 1. Whatisthe speed ofthe center of mass ofthe two-block system immediately before the collision?: The speed is v. 2. How could a student verify that the collision under consideration is an inelastic collision for the two-block system?: By comparing the final kinetic energy of the system with the initial kinetic energy of the system 3. 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?: m0v0 4m0v0=m0vXf+2m0vYf, because the two blocks initially travel in opposite directions, and the blocks do not stick after the collision. 4. Block X and blockY 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. BlockY 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?: 1.4 m/s 5. Block X and blockY 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. BlockY has a mass of 1kg and a speed of 3m/s. After the collision, block X travelsin the horizontal direction with a speed of