| A | B |
|---|
| machine | device tht makes work easier |
| simple machine | machine that works with only one movement |
| ideal machine | where work input is equal to work output |
| effort force | force applied TO a machine |
| resistance force | force applied BY a machine |
| mechanical advantage | number of times a machine multiplies the effort force |
| lever | bar that pivots about a fulcrum |
| fulcrum | fixed point on a lever |
| pulley | grooved wheel with ropes |
| wheel and axle | has two wheels of different sizes |
| inclined plane | sloping surfacce used to raise objects |
| screw | inclined plane wrapped around a cylindrical post |
| wedge | inclined plane with one or two sloping sides |
| compound machine | combination of 2 or more simple machines |
| efficiency | the measure of how much of the work put into a machine is changed to usedful work put out by the machine |
| power | the rate at which work is done |
| watts | unit of power |
