Simple Machines

1. CLASS The type of lever where the fulcrum is located between the effort and the load like a seesaw
5. The standard unit of measurement for Work
6. In physics this is calculated as Force multiplied by Distance
8. An inclined plane wrapped spirally around a central cylinder
12. The force you apply to a machine to make it do work
14. The percentage of input work that becomes useful output work which is always less than 100 percent due to friction
15. The object or weight that is being moved or lifted by the machine
16. A flat sloped surface that allows you to lift a heavy load with less force over a longer distance
17. The type of lever where the load is located between the fulcrum and the effort like a wheelbarrow
18. A type of pulley that has a mechanical advantage of one.

1. The fixed pivot point upon which a lever turns
2. A simple machine consisting of a grooved wheel with a rope or cable wrapped around it
3. A device made of two inclined planes placed back to back often used to split objects
4. A device made up of two or more simple machines working together
7. A rigid bar that rotates around a fixed point to move a load
9. The type of lever where the effort is applied between the fulcrum and the load like a hockey stick
10. The effort force is reduced when applying the force to the _____ of a wheel and axel
11. A type of pulley that moves with the load and effectively multiplies your force
13. Screws have a low efficiency due to _________.