Across
- 2. machine combines several simple machine
- 7. moving an object a distance
- 8. two inclined planes used together to pry or move objects apart
- 10. machine have only one or two parts
- 13. wave lengths of electromagnetic radiation; optics is the study of the use of light
- 15. a flat, sloping surface
- 17. the study of force which may be on objects that are moving or at rest (static)
- 18. a rotating lever that is round connected to a shaft
- 19. the study of force
- 20. a wheel that spins freely on its axle
Down
- 1. detectable air waves created by vibration; measured as wave frequency
- 3. the rate at which work is done
- 4. a modified inclined plane that wraps around a cylinder which is also an axle
- 5. a device that can increase the amount or the direction of force
- 6. resistance to movement between two surfaces that touch
- 9. how well a machine overcomes friction
- 11. the energy produced by the motions of molecules and atoms
- 12. the opposition to movement
- 13. a bar or rod that rotates on a fixed point
- 14. the push or pull on an object to move it
- 16. magnets can be used to produce electricity which can create power