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
1.1.1.1. no units
1.1.1.1.1. 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
2.1.1.1. 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
3.1.1.1. 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
4.1.1.1. 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
5.1.1.1. A wedge is a simple machine.
6. Screw
6.1. an inclined plane wrapped around a cylinder
6.1.1. screws; bolts
6.1.1.1. A screw is a simple machine.
7. Work
7.1. the product of force and distance
7.1.1. force x distance
7.1.1.1. joules
7.1.1.1.1. pulling a suitcase; pushing a wheelbarrow
8. Power
8.1. the rate of doing work
8.1.1. work / time
8.1.1.1. watts
8.1.1.1.1. 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
9.1.1.1. 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
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.