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

1. You accelerate. The speed of your car doubles. Which of the following items quadruples as a result?
1. momentum
2. potential energy
3. acceleration
4. kinetic energy
5. all of these
6. none of these

2. 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
1. mass
2. acceleration
3. kinetic energy
4. potential energy
5. collisions
6. none of these
7. all of these

3. A certain car has momentum. It therefore must also have
1. acceleration
2. kinetic energy
3. force
4. potential energy
5. impulse
6. none of these
7. all of these

4. A 100 Newton force is used to push a table by 5 meters. The amount of work done on the table is
1. 5 J
2. 100 J
3. 0 J
4. 500 J
5. 1000 J

5. 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.
1. the same
2. twice
3. one third
4. three quarters
5. two thirds
6. not enough information