simple machines

1. 3rd class levers

1.1. is located between the fulcrum and the output force.

2. incline planes

2.1. a plane whose angle to the horizontal is less than a right angle. inclined plane in Science Expand. inclined plane. (ĭn'klīnd') A plane surface, such as a ramp or a blade, set at an acute angle to a horizontal surface, a direction of motion, or a direction of force.

3. wedge

3.1. a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.

4. screw

4.1. an inclined plane wrapped around a cylinder

5. wheel and axle

5.1. a simple machine that consist of two disks or cylinders,each one with a different radius

6. pulley

6.1. A machine consisting of a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load. Combinations of two or more pulleys working together reduce the force needed to lift a load.

7. work

7.1. using a force to move an object a distance

7.2. work output:work input*efficancy/100%

8. power

8.1. Power is the rate (energy amount per time period) at which work is done or energy converted. The scientific unit of power is the watt (W), which is equal to one joule (energy amount) per second (time period).

8.2. work/time

9. mahanical advantage

9.1. The ratio of the output force (acting on a load) produced by a machine to the applied effort (the input force).

9.2. input distance/output distance

10. 1st class levers

10.1. always located between the input force and the output force

11. 2nd class levers

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