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Friction and Vertical Circular Motion Problems

Assertion :In...

Question

Assertion :In circular motion, work done by centripetal force is not zero always Reason: If the speed of a particle increases or decreases in circular motion, net force acting on the particle does not remain towards centre

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
The work done by centripital force is always zero as it is perpendicular to the velocity and it particles decrease or increase their speeds in circular motion then an extra acceleration generates which deviates the net acceleration from pointing in the centre.

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