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Question

A body is moving in a circular path with a constant speed if it has

A
a constant velocity.
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B
a constant acceleration
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C
an acceleration of constant magnitude.
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D
an acceleration which varies with time in magnitude.
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Solution

The correct option is C an acceleration of constant magnitude.
We know that
ac=v2r is constant in magnitude if v is constant.
where ac is centripetal acceleration,
v is speed and ‘r’ is the radius of the circle.

Direction of velocity vector and acceleration change constantly but the magnitude of acceleration is always constant.

Hence option C is the correct answer.

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