Simple Machines

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Simple Machines by Mind Map: Simple Machines

1. Work

1.1. the product of force and distance

1.1.1. force x distance

1.1.1.1. joules

1.1.1.1.1. pulling a suitcase; pushing a wheelbarrow

2. Power

2.1. the rate of doing work

2.1.1. work / time

2.1.1.1. watts

2.1.1.1.1. snow blower; snow plow

3. Mechanical Advantage

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

3.1.1. Actual: output / input, Ideal: input / output

3.1.1.1. no units

3.1.1.1.1. different positions for cracking a nut; different length loading ramps

4. 1st Class Levers

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

4.1.1. opening a paint can with a screwdriver; tongs

4.1.1.1. A 1st class lever is a simple machine.

5. 2nd Class Lever

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

5.1.1. wheelbarrow

5.1.1.1. A 2nd class lever is a simple machine.

6. 3rd Class Lever

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

6.1.1. broom; golf club

6.1.1.1. A 3rd class lever is a simple machine.

7. Inclined Plane

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

7.1.1. switchback roads; ramps

7.1.1.1. An inclined plane is a simple machine.

8. Wedge

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

8.1.1. knife blade; zipper

8.1.1.1. A wedge is a simple machine.

9. Screw

9.1. an inclined plane wrapped around a cylinder

9.1.1. screws; bolts

9.1.1.1. A screw 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

10.1.1.1. 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

11.1.1.1. A pulley is a simple machine.