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Question

# Which of the following statements is true about uniform circular motion?

A

Acceleration does not exist.

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B
Acceleration exists but is constant.
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C

Acceleration exists but its magnitude is constant and only direction changes.

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D
Acceleration exists and both magnitude and direction changes.
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Solution

## The correct option is C Acceleration exists but its magnitude is constant and only direction changes. There is acceleration in an uniform circular motion which is directed towards the centre of the circle and is known as centripetal acceleration. Since ac=v2R , where R is the radius of circle and v is the velocity of particle and since both are constant, therefore its magnitude is constant and only direction changes.

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