| A | B |
|---|
| speed | distance/time |
| velocity | speed in a given direction |
| acceleration | the rate at which velocity changes. Final velocity - Initial velocity/time |
| force | a push or pull acting on an object |
| the unit of force | Newton |
| balanced force | the net force acting on the object is zero. There will be no change in motion. |
| unbalanced force | there is one force greater than another. The net force is NOT zero. Motion is in the direction of the greater force. |
| Gravity | the force that pulls objects to Earth. |
| Friction | the force that one surface exerts on another when they rub together. slows down motion |
