- This page provides answers to Physics Module Questions – Module #7.
- The answers are bolded.

- You accelerate. The speed of your car doubles. Which of the following items quadruples as a result?
- momentum
- potential energy
- acceleration
**kinetic energy**- all of these
- none of these

- Two railroad cars move towards each other at 10 m/s. They collide and bounce backward at 20 m/s. This event violates conservation of
- mass
- acceleration
**kinetic energy**- potential energy
- collisions
- none of these
- all of these

- A certain car has momentum. It therefore must also have
- acceleration
**kinetic energy**- force
- potential energy
- impulse
- none of these
- all of these

- A 100 Newton force is used to push a table by 5 meters. The amount of work done on the table is
- 5 J
- 100 J
- 0 J
**500 J**- 1000 J

- A meteor moving at 30 m/s collides with a twice-as-massive meteor and sticks to it. After the collision, the combined meteors have a kinetic energy that is ___ as much as the total kinetic energy before the collision.
- the same
- twice
**one third**- three quarters
- two thirds
- not enough information

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