Across
- 2. A push or pull that can change motion.
- 4. Mass times velocity; conserved in collisions.
- 5. friction Resistance when an object rolls over a surface.
- 9. forces Cause a change in motion.
- 11. friction Keeps objects from moving when at rest.
- 12. friction Resistance between two surfaces in motion.
- 14. Force of gravity acting on mass.
Down
- 1. Rate of change of velocity.
- 3. Resistance to changes in motion.
- 6. friction Resistance in liquids or gases.
- 7. The amount of matter in an object.
- 8. Scientist who formulated the laws of motion.
- 10. forces Forces that cancel each other out.
- 13. force The total force acting on an object.
- 15. The force that pulls objects toward Earth.