1.1. a displacement of the point of application in the direction of the force
1.2. Joules
1.3. Work = force * distance
1.4. Simple machines do work
2. Wedge
2.1. a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
2.2. holds something open.
3. Screw
3.1. or bolt, is a type of fastener
3.2. Holds thing together
4. Wheel and axle
4.1. a wheel attached to an axle so that these two parts rotate together in which a force is transferred from one to the other.
4.2. Makes machines move
5. Pulley
5.1. is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt along its circumference
5.2. Helps things work, move
6. Power
6.1. The rate of doing work
6.2. Simple machines do power
6.3. power = work / time
6.4. watts
6.5. Gas driven saw or tool
7. Mechanical Advantage
7.1. a measure of the force amplification achieved by using a tool
7.2. M.A = output force / input force
7.3. It shows how efficient they are
8. 1st class levers
8.1. have the fulcrum placed between the load and the effort, as in the seesaw, crowbar, and balance scale
8.2. Used to pry somwrhing open
9. 2nd class levers
9.1. have the load between the effort and the fulcrum
9.2. Used to lift something
10. 3rd class levers
10.1. Used to move something to somewhere
10.2. have the effort placed between the load and the fulcrum.
