Across
- 1. central point of a seesaw
- 4. object with no moving parts
- 6. two surfaces rubbing
- 7. rod used to do work
- 8. put a lever against to shift a boulder
- 10. plane ramps and roller coasters
Down
- 1. used to lift an elevator
- 2. found on vehicles
- 3. forces things apart
- 4. found on a screw
- 5. holds wheels
- 9. bigger than it is