| A | B |
|---|
| work | quantity that measures the effects of a force acting over a distance |
| force x distance | work |
| power | the rate at which work is done |
| joule | SI unit for work |
| Newton x meter | 1 joule |
| watt | SI unit for power |
| 746 watts | 1 horsepower |
| mechanical advantage | the number by which a machine multiplies force or distance |
| simple machines | six basic types of machines that all others are made from |
| hammer | a first class lever |
| wheelbarrow | a second class lever |
| pulley | a modified lever |
| wheel and axle | a lever or pulley connected to a shaft |
| inclined plane | multiplies and redirects force |
| wedge | a modified inclined plane |
| screw | an inclined plane wrapped around a cylinder |
| compound machine | machine made of more than one simple machine |
| potential energy | stored energy of position |
| gravitational potential energy | mass x free fall acceleration x height |
| kinetic energy | energy of a moving object |
