| A | B |
|---|
| machine | device that makes work easier |
| simple machine | device that performs work with one movement |
| resistance force | force applied by a machine |
| effort force | force applied to a machine |
| ideal machine | machine where work input equals work output |
| mechanical advantage | resistant force/effort force = MA |
| screw | inclined plane wrapped around a cylinder |
| lever | bar that pivots around a fixed point |
| inclined plane | ramp or sloping surface used to raise objects |
| compound machine | combination of simple machines |
| wedge | an inclined plane with one or two sloping sides |
| wheel and axle | two different sized wheels that rotate together |
| efficiency | work output of a machine divided by the work input |
| power | the rate at which work is done |
| IMA = 1 (pulleys) | single fixed pulley |
| IMA = 2 (pulleys) | single movable pulley |
| IMA = 4 | block and tackle |
