Wheel and Axle: Consists of a rod through the center and a wheel, Reduces friction, Usually has a turning motion, Example: door knob, Screw: A wire wrapped around an incline plane, Hold things together or lift an object, Wedge: Used to cut or separate, Scissors are two types of this simple machine joined together.., Pulley: Wheel and rope, Changes the direction of a force , Examples: elevator, flagpole, Used to raise or lower a load, Lever: Contains a bar and a fulcrum, Placing the fulcrum near the load increases mechanical advantage, Ex. See saw, Inclined Plane: Ramp, Connects a lower lever to a higher level,

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