| A | B |
|---|
| motion | A change in an object’s position as compared to objects around it. |
| position | An object’s location, or place. |
| speed | A measure of the distance an object travels in a certain amount of time. |
| velocity | A measure of speed in a certain direction. |
| force | A push that moves an object away or a pull that moves an object nearer |
| friction | A force that slows or stops motion between two surfaces that are touching. |
| gravity | The force that pulls bodies or objects toward other bodies or objects. |
| inclined plane | A simple machine made up of a slanted surface. |
| lever | A simple machine made up of a stiff bar that moves freely around a fixed point. |
| pulley | A simple machine made up of a rope fitted around the rim of a fixed wheel. |
| screw | A simple machine made up of an inclined plane wrapped around a column, |
| simple machine | A device that changes a force. |
| wedge | A simple machine made up of two inclined planes. |
| wheel and axle | A simple machine made up of two cylinders that turn on the same axis. |
