Across
- 4. the force that opposes motion
- 7. unit of energy
- 8. force x displacement
- 9. unit of mass
- 12. unit of force
- 13. another name for air resistance
- 14. when the forces cancel out
- 15. a unit of displacement
- 16. the ability to do work
- 18. straight up or down
Down
- 1. a push or a pull
- 2. flat and level
- 3. energy of motion
- 5. energy of position
- 6. a unit of time
- 10. the steepness of a line
- 11. rate of change of velocity
- 17. it gives weight to mass