| A | B |
|---|
| motion | a change in POSITION relative to a reference point |
| distance | how far something has moved |
| displacement | an object's change in position relative to a starting point |
| formula for speed or velocity | s = d/t |
| average speed | total distance divided by total time |
| instantaneous speed | measured by speedometer |
| velocity | speed that factors in DIRECTION |
| acceleration | the rate of change in velocity |
| acceleration formula | a=Vf-Vi/t |
| force | a push or pull |
| net force | two or more forces act on an object at the same time (combine the forces to get net force) |
| balanced forces | equal in size but opposite in direction, net force = 0 |
| unbalanced forces | unequal in siz and apposite in direction - result is movement in the direction of the bigger force |
| Newton's First Law | The Law of Inertia - objects at rest stay at rest, objects in motion stay in motion (until an unbalanced force acts on the object to change it) |
| untis for speed | km/hr, m/s |
| units for time | hours, minutes, seconds |
| units for distance | km, m, cm |
| units for acceleration | m/s2 (squared), km/hr/s |
