Across
- 4. how easy and quickly you can do something
- 7. action of doing things
- 8. ramp
- 12. circuit with one path
- 13. the efficiency of something
- 14. pull down or up to do work
- 15. bottle cap
Down
- 1. circle of energy
- 2. a wheel and a rope
- 3. a tire
- 5. circuit with two paths
- 6. the energy of motion
- 7. a sharp tool
- 9. the energy of potential motion
- 10. a basic machine to do work
- 11. the sum of potential and kinetic energy