Chapter 14

4. equals the ratio of the output force to the input force
6. The distance the input force acts through
9. The percentage of the work input that becomes work output
11. is a simple machine that consists of two disks or cylinders, each one with a different radius
12. The rate of doing work
13. machine is the output force multiplied by the output distance
14. the product of force and distance Work is done when a force acts on an object in the direction the object moves
15. The force that is exerted by a machine is called
16. Equal to one joule per second
18. The fixed point the bar rotates around
22. machine is the number of times that the machine increases an input force
24. The force you exert on a machine
25. The work done by the input force acting through the input distance

1. is the distance between the output force and the fulcrum
2. machine is the mechanical advantage in the absence of friction
3. a V-shaped object whose sides are two inclined planes sloped toward each other
5. is a slanted surface along which a force moves an object to a different elevation
7. is a simple machine that consists of a rope that fits into a groove in a wheel
8. Equal to about 746 watts
10. of a lever is the distance between the input force and the fulcrum
15. The distance the output force is exerted through
17. is the SI unit of work
19. rigid bar that is free to move around a fixed point
20. Device that changes a force
21. a combination of two or more simple machines that operate together
23. is an inclined plane wrapped around a cylinder