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# Simple Machines

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### Simple Machines

1. 1. Simple Machines <ul><li>A machine with few or no moving parts. </li></ul><ul><li>Knife, door knob, ramp, saw, screw driver, drill, teeter totter, slide, ladder, and many more. </li></ul>
2. 2. Six Simple Machines <ul><li>Lever </li></ul><ul><li>Pulley </li></ul><ul><li>Wheel and Axle </li></ul><ul><li>Incline Plane </li></ul><ul><li>Wedge </li></ul><ul><li>Screw </li></ul>
3. 3. Lever <ul><li>A lever is a board on a fixed point. Levers have three main parts; a fulcrum, load, and force. A teeter totter is a lever. </li></ul>load fulcrum force
4. 4. Pulley <ul><li>A pulley is a simple machine that uses a wheel with a groove and a rope. Flag poles have pulleys. Curtains and blinds use pulleys. Construction cranes also have pulleys. </li></ul>pulley
5. 5. Wheel and Axle <ul><li>A wheel and axle is a wheel that turns on a post. A door knob, pencil sharpener, and roller skates have wheels and axles. </li></ul>Door knob is a wheel and axle
6. 6. Inclined Plane <ul><li>An inclined plane is an object that is raised on one end. A ramp, door stop, hill, and slide are inclined planes. </li></ul>Inclined plane
7. 7. Wedge <ul><li>Two inclined planes placed back to back. An ax, knife, and nail are wedges. </li></ul>wedge
8. 8. Screw <ul><li>An inclined plane wrapped into a spiral. </li></ul>screw
9. 9. Compound Machine <ul><li>Two or more simple machines used together. A pair of scissors has a wedge and a lever. </li></ul>