| A | B |
|---|
| comparing a machine's work output with work input | mechanical efficiency |
| product of the input force and distance through which it is exerted | work input |
| machine with a bar that pivots on a fixed point | lever |
| product of the output force and the distance through which it is exerted | work output |
| unit used to express power | watt |
| device that makes work easier by changing the size or direction of a force | machine |
| unit used to express work | joule |
| machine with two circular devices of different sizes | wheel and axle |
| machine made of two or more simple machines | compund machine |
| transfer of energy that causes an object to move in the direction of the force | work |
| the rate at which energy is transferred | power |
| number of times a machine multiplies force | mechanical advantage |
| machine with a grooved wheel that holds a cable | pulley |
