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Question

A spinning wheel A is brought in contact with another wheel B initially at rest. Because of the friction at contact, the second wheel also starts spinning. Heat energy is dissipated.


A

True

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B

False

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Solution

The correct option is A

True


When the two wheels come into contact with each other, friction between them opposes the relative motion and wheel B also starts to rotate, increasing its mechanical energy and some of the energy is lost as heat.


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