Checkpoint. Please continue working. 4 . What are the net external forces acting on the system of the two gliders ? Tutorial Section 7.3 - Working with energy in collisions 5 . What is the change in momentum of Glider C? 1. Imagine you are given the masses as well as the initial and final velocities of two objects which collide. a. How can you determine whether the momentum of the system of two objects is not changed by the collision? 6. What does conservation of momentum predict the change in total momentum of the system will be? Explain. . How can you determine whether the kinetic energy of the system of two objects is not changed by the collision? 7. What should the change in momentum of glider D be? Use this to determine the final velocity of orglider D. en of aldi dooley lenit arti ol girl 2. Consider the system to be two objects which collide. To show what quantities are the same before and after the collision, fill in each box of the table below with one of the following responses: yes, no, can't be determined (CBD). You can review the definitions of these terms in the explanation packet. 8. What is the sum of the kinetic energy of both gliders after the collision?even inenute A SI Type of collision Is the momentum of the system Is the kinetic energy of the the same before and after the system the same before and hislex Sirebute bill rhiw su collision? after the collision? elastic 9 . How does this compare with the initial kinetic energy of the system of both gliders? If it is the same, write so explicitly. If it changes, explain how energy is lost/gained. inelastic Consider an experiment in which two gliders collide on a level, frictionless air track. Glider C moves with an initial velocity of 4 m/s to the right and collides with a second glider, which is initially at rest. After the collision, glider C continues to move to the right, with a final velocity of 1 m/s (in the same direction as its initial velocity). We call the second glider "D." The mass of glider C is half that of glider D (i.e., me = 1/2 mp), and glider D has a mass of 2 kg. The experiment is shown a. Is this collision elastic? Why or why not? below. Before collision After collision 3. Identify all of the forces that act on the two gliders. What b . If there were an elastic collision between gliders C and D with the initial conditions is the agent (source) of each described above, would glider C be at rest after the collision? force? For each force listed, C D specify for the system of the two Air Track Air Track gliders, whether it is an internal or Note: arrows here show direction of velocity only, their lengths do not external force to the system. indicate relative speed. C. Is it possible to have a collision in which glider C is at rest after the collision? Explain