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PS Ch2
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 the 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 an 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. |