Across
- 4. an example of this simple machine is a plastic bottle top
- 8. _____________ potential energy depends on mass and height; equals mass times 9.8 times height, OR equals weight times height (chp 4)
- 9. the gravitational force exerted on an object (chp 3)
- 11. device in a car that prevents you from going forward in a car crash (chp 3)
- 13. this force depends on the kinds of surfaces, and the forces pressing the surfaces together (chp 3)
- 16. device in a car that prevents your head from whipping backwards in a car crash (chp 3)
- 17. ________________energy depends on mass and speed; equals 1/2 times mass times velocity squared (chp 4)
- 18. an example of this simple machine is a ramp(chp 4)
- 20. ______________potential energy is energy that is stored by something that can stretch or compress (chp 4)
Down
- 1. Newton's _______________ states that mass times acceleration is equal to the force acting on the object (chp 3)
- 2. the amount of matter something has (chp 3)
- 3. the attractive force between any 2 objects; also depends on mass and distance (chp 3)
- 5. a friction-like force that opposes the motion of objects falling through the air (chp 3)
- 6. the property of an object to resist change (chp 3)
- 7. calculated by dividing energy by time (chp 4)
- 10. an example of this simple machine is a rake (chp 4)
- 12. Newton's _______________ states that for ever action force, there is an equal and opposite reaction force (chp 3)
- 13. a push or pull one body exerts on another (chp 3)
- 14. Newton's ________________ states that an object in motion will stay in motion, and an object at rest will stay at rest (chp 3)
- 15. _____________ energy is energy that is stored (chp 4)
- 19. an example of this simple machine is an axe (chp 4)