Chap 8 crossword

2. A unit of work equal to one newton-meter
6. a machine made of more than one simple machine
8. a slanted surface along which a force moves an object to a different elevation
9. A simple machine that consists of a rope that fits into a groove in a wheel
13. The less work a machine has to do to overcome friction
14. the work done by a machine
17. an inclined plane wrapped in a spiral around a cylindrical post
18. work output/work input x 100
19. output force/input force
20. the rate at which work is done

1. A simple machine that consists of a rigid bar that pivots about a fixed point.
3. Occurs when a force causes a object to move
4. the work done on a machine
5. Two different sized circular objects that are attached together and turn as one.
7. the number of times a machine increases a force exerted on it
10. An inclined plane that moves
11. W=Fd
12. The fixed point around which a lever pivots
14. A measure of power equal to one joule of work per second.
15. A device that makes work easier
16. P=W/t