Physics

Pre-Lab Questions

1. A billiard ball collides head-on with billiard ball at rest.

a. Sketch a position vs. time graph for each ball, include position before the collision, once the collision occurs and after the collision.

b. What can be said about the conservation of momentum for the collision? Explain your answer.

2. Write down the total momentum for two marbles of mass, m, both moving at velocity, v . What is the kinetic energy of the system?

3. When you drop two marbles at once, why doesn’t only one marble come off the end twice as fast? Write down the kinetic energy of one marble with mass m and velocity 2v and compare this to your answer in Experiment 1 Post Lab Question 4 to check.

Note: Assume the collisions are perfectly elastic.