Across
- 3. the force that causes movement
- 5. the length travelled from one point to another
- 6. the amount of matter in something
- 9. how effective an action is
Down
- 1. the power used
- 2. the force exerted on mass by gravity
- 4. energy of movement
- 7. the increase in speed
- 8. is the rate at how fast something moves