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Net Acceleration for Non Uniform Circular Motion

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Question

A cross-country runner follows a circular path that curves to his left. As he follows this path at constant speed, what is the directions of his acceleration when he is facing straight north?

A

North

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B

South

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C

East

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D

West

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E

The acceleration is zero

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Solution

The correct option is C West
As the speed of runner is constant so its tangential acceleration is zero .
Now it has centripetal acceleration , which is always directed towards the center of circular motion , the runner is curving to his left and facing north therefore the center of circular path will be towards left of north i.e. west , therefore the acceleration is directed towards west .

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Net Acceleration for Non Uniform Circular Motion

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