A body moving in a circle with constant speed is said to have an acceleration. Explain.
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because it changes direction as it moves
As the body keeps moving the circular path, its velocity changes due to change in direction. The body is said to accelerate since acceleration is the rate of change of change of velocity with time.
The body keeps changing direction, hence change in velocity since velocity is a vector quantity. This velocity change is acceleration.
the direction of velocity changes with time hence it accelerates