| A | B |
|---|
| work | force acting over a distance |
| watt | unit of power; 1 joule per second |
| joule | unit of work; 1 Newton-meter |
| Newton | unit of force (1kgm/sec) |
| power | rate at which work is done |
| force | a push or pull on an object |
| friction | force that acts in the opposite direction of motion |
| inertia | Latin for "lazy" |
| gravity | force of attraction between objects |
| speed | rate at which an object moves |
