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Chapter 2 Motion- IV
Vocabulary
| Term | Definition |
|---|---|
| Distance | how far an object moves. |
| Displacement | distance and direction of an object's change in position from the starting point. |
| Speed | distance an object travels per unit of time. |
| Average Speed | total distance an object travels divided by the total time it takes to travel that distance. |
| Instantaneous Speed | Speed of an object at a given point in time; is constant for an object moving with constant speed, and changes with time for an object that is slowing down or speeding up. |
| Velocity | the speed and direction of a moving object. |
| Acceleration | rate of change of velocity; can be calculated by dividing the change in velocity by the time it takes the change to occur. |
| force | a push or pull exerted on an object. |
| net force | sum of the forces that are acting on an object. |
| balanced force | forces on a object that combine to give a zero net force and do not change the motion of the object. |
| inertia | resistance of an object to a change in its motion. |