| A | B |
|---|
| force | push or pull |
| motion | change in position |
| more mass you have | more force you need to move |
| speed | the measure how fast something moves over a certain distance |
| gravity | the force that pulls us and everything around us down |
| weight | the measure of the pull of gravity |
| mass | how much matter something has |
| work | the measure of a force it takes to MOVE an object |
| newton-meters | how work is measured (force times distance) |
| simple machine | a tool that helps people do work |
| inclined plane | flat surface set at an angle |
| pulley | a rope over a wheel |
| screw | like an inclined plane wrapping around a pencil |
| wedge | two inclined planes stuck back to back |
| lever | a bar that moves on a fixed point |
| fulcrum | the fixed point on a lever |
| wheel and axle | example is wheels on the axle of a wagon |
| compound machine | two or more simple machines put together |
| simple machines reduce the amount of | force |
