color of money

Color of Money (1986)

Concept featured in clip: Elastic Collisions/Conservation of Linear Momentum
Location of clip:


Play Flickclip Here

Summary of clip: The scene opens with Vince (Tom Cruise) playing a game of 9-ball (billiards) with Eddie (Paul Newman). There are various examples of the billiard balls striking each other and then going into the pockets. Another good example to point out is the break (opening shot of the game).

Connection of flickclip to the concept: This is a good clip to introduce elastic collisions and the conservation of linear momentum. Billiards is the stereotypical example; therefore it is beneficial for students to see it in action.
Suggestions to teachers:

1. Suggested questions for students when viewing the clip:

a. Have students differentiate between elastic and inelastic collisions. In which is mechanical energy conserved? In which is linear momentum conserved?

b. What type of collision occurs when a pool ball strikes another pool ball?

c. Explain how the cue ball is used (i.e., perfectly elastic collision between a stationary ball and a moving (cue) ball, what happens to the kinetic energy and momentum of the stationary ball when it is struck by the moving ball).

d. Other then pool, what are some practical uses of elastic collisions (e.g., particle accelerator)?