Chapter 3
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11 terms
Terms | Definitions |
|---|---|
 Speed | How fast something moves, the distance traveled per unit of time |
| Average speed | the total distance traveled divided by the time it takes to travel that distance |
| Instantaneous speed | The speed at any instant |
| Constant speed | when an object covers equal distances in equal amounts of time |
| Displacement | the change in position of an object |
| Velocity | The speed of an object and a specification of it's direction of motion |
| Vector quantity | Quantity in physics that has both magnitude and direction |
| Scalar quantity | Quantity that can be described by magnitude without direction |
| Acceleration | A rate at which velocity changes with time; the change in velocity may be in magnitude, or direction, or both |
| Free fall | Motion under the influence of gravity only |
| Hang time | the total time a projectile spends in flight |
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