| Term | Definition |
|---|
| velocity-time graph | shows how velocity is related to time |
| instantaneous acceleration | the change in velocity of an object at an instan of time is its |
| average acceleration | the rate at which an object's velocity changes is its |
| free fall | the motion of falling objects when air resistance is neligible is called |
| acceleration | object's change in velocity during some measurable time interval divided by that time interval |
| acceleration due to gravity | the acceleration of an object in free fall that results from the influence of Earth's gravity |
| average acceleration | the slope of a tangent line on a velocity-time graph |
| slowing down | when acceleration and velocity vectors are pointing in opposite directions, the object is |
| .25 m/s2 | if a runner accelerates from 2 m/s to 3m/s in 4s, her average acceleration is |
| displacement | the area under a velocity-time graph is equal to the object's |
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