Across
- 5. increase in length of material from original length
- 7. work done/time taken
- 10. useful output energy/total input energy x 100%
- 14. rate of change of velocity
- 16. rate of change in an object’s displacement
- 19. done force x distance
- 20. area under velocity-time graph
Down
- 1. an object at rest or traveling at constant speed
- 2. normal force/cross-sectional area
- 3. mass/volume
- 4. quantity that is conserved during any change
- 6. pair of equal and opposite forces that act on an object and produce rotation only
- 8. force x perpendicular distance
- 9. only magnitude
- 11. mass x acceleration
- 12. magnitude and direction
- 13. momentum product of its mass and velocity
- 15. when kinetic energy is not conserved
- 17. measure of the mass of an object
- 18. force and perpendicular distance between the forces