Chapter 11 section 4

2. both arms are on the same side of the fulcrum with the effort arm longer.
3. effort arm and resistance arm are on opposite sides of the fulcrum
6. a grooved wheel with a rope running along the groove.
7. has one or two sloping sides that are used to cause a spreading force
9. a pivot point that a lever rotates around
11. both arms are on the same side of the fulcrum and the resistance arm is longer.
13. when a simple machine multiplies you effort, it also ___________ the distance over which that effort is used.
14. the ratio of the lengths of the effort arm and resistance arm
15. the force that creates heat and causes machines to be less efficient
16. an inclined plane wrapped around a cylinder
18. a simple machine that is used to slide things up
20. the part of the machine that receives the effort
21. a machine that takes one force and changes it direction, distance, or strength

1. heavy weights used in an elevator that are attached to provide additional force
4. the force the machine applies
5. the part of the machine that delivers the output
8. the ratio of input energy to output work written as a percentage.
10. this type of third class lever has two levers attached at a fulcrum.
12. gears are an example of this type of simple machine
17. uses a wheel and axle to wind up a length of rope
19. when two or more simple machines are combined