Chapter 14

3. The force that is exerted by a machine
6. equals the ratio of the output force to the input force
9. The distance the output force is exerted through
11. A machine is the number of times that the machine increases an input force
13. A machine is output force multiplied by the output distance
14. The rate of doing work
16. is equal to about 746 watts
20. a v-shaped object whose sides are two inclined planes sloped toward each other
21. The distance the input force acts through
25. of a machine is the mechanical advantage in the absence of friction

1. a combination of two or more simple machines that operate together
2. The force you exert on a machine
4. A rigid bar that is free to move around a fixed point
5. a simple machine that consists of a rope that fits into a groove in a wheel
7. A device that changes the force
8. The work done by the input force acting through the input distance
10. which is equal to one joule per second
12. the SI unit of work
13. A simple machine consists of two disks or cylinders each one with a different radius
15. the product of force and distance
17. Expressed as a percentage efficiency
18. a slanted surface along which a force moves on an object to a different elevation
19. A lever is the distance between the input force and the fulcrum
22. The distance between the output force and the fulcrum
23. a inclined plane wrapped around a cylinder
24. The fixed point the bar rotates around