Simple Machines

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Simple Machines by Mind Map: Simple Machines

1. Mechanical Advantage

1.1. the number of times that a machine increases an input force

1.1.1. Actual: output / input, Ideal: input / output no units different positions for cracking a nut; different length loading ramps

2. 2nd Class Lever

2.1. the output force is located between the input force and the fulcrum

2.1.1. wheelbarrow A 2nd class lever is a simple machine.

3. 3rd Class Lever

3.1. the input force is located between the fulcrum and the output force

3.1.1. broom; golf club A 3rd class lever is a simple machine.

4. Inclined Plane

4.1. a slanted surface along which a force moves an object to a different elevation

4.1.1. switchback roads; ramps An inclined plane is a simple machine.

5. Wedge

5.1. a v-shaped object whose sides are two inclined planes sloped toward eachother

5.1.1. knife blade; zipper A wedge is a simple machine.

6. Screw

6.1. an inclined plane wrapped around a cylinder

6.1.1. screws; bolts A screw is a simple machine.

7. Work

7.1. the product of force and distance

7.1.1. force x distance joules pulling a suitcase; pushing a wheelbarrow

8. Power

8.1. the rate of doing work

8.1.1. work / time watts snow blower; snow plow

9. 1st Class Levers

9.1. the fulcrum is located between the input and output force

9.1.1. opening a paint can with a screwdriver; tongs A 1st class lever is a simple machine.

10. Wheel & Axle

10.1. consists of two disks or cylinders, each one with a different radius

10.1.1. car A wheel and axle is a simple machine.

11. Pulley

11.1. consists of a rope that fits into a groove in a wheel

11.1.1. pulley system A pulley is a simple machine.