Simple Machines

3. unit for force
8. a hammer is an example of this type of lever
10. this is an inclined plane that is wrapped in a spiral around a cylinder
11. a device that makes work easier by changing the size or direction of a force
12. this is a pair of inclined planes that move
14. a comparison of a machine's work output with the work input
16. unit for work
17. machines that are made of two or more simple machines
19. unit for time
20. a simple machine that has a grooved end of the rope, and an input force is applied to the other end

1. the rate at which work is done or energy is transformed
2. in this type of lever the fulcrum is in the middle of the load and input force
4. a fixed point that is found in levers
5. the work done by a machine on an object
6. the transfer of energy to an object by using a force that causes the object to move in the direction of the force
7. a simple machine consisting of two circular objects of different sizes
9. a wheel-barrow is an example of this type of lever
12. the work you do on the machine
13. unit for power
14. a number that tells how many times a machine multiplies force
15. a simple machine that is a straight, slanted surface
18. a inclined plane makes work easier by decreasing the input force, but increasing the _____________
21. a simple machine that has a bar that pivots at a fixed point called a fulcrum