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Motion

In physics, motion is the change in position of an object with respect to its surroundings in a given interval of time.



Motion is mathematically described in terms of displacement, distance, velocity, acceleration, and speed.



Motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.



Motion along a line or a curve is called translation.



Motion that changes the orientation of a body is called rotation.



In both cases all points in the body have the same velocity and the same acceleration 



The most general kind of motion combines both translation and rotation.


Velocity is directed speed

Acceleration is rate of change of velocity


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