Chapter 14

5. a slanted surface along which a force moves an object to a different height
7. a combination of two or more simple machines that operate together
9. study of motion
10. a simple machine that consists of two disks or cylinder, each with a different radius
12. a unit of power equal to 1 joule per second
15. a unit of work equal to one newton-meter
16. a device that changes a force
17. the fixed point a bar rotates around

1. the number of times that the machine increases an input force
2. a V-shaped object whose sides are toe inclined planes sloped toward each other
3. a rigid bar that is free to move around a fixed point, or fulcrum
4. a simple machine that consists of a rope that fits into a groove in a wheel
6. a comparison of engine power; equals about 746 Watts
8. an inclined plane wrapped around a cylinder
11. the percentage of the work input that becomes the work output
13. the rate of doing work
14. the product of force and distance