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When to Call It a Pure Translation

A body rollin...

Question

A body rolling freely on the surface of the earth eventually comes to rest because

A

It has mass

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B

It suffers friction

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C

It has inertia of rest

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D

It has momentum

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Solution

The correct option is B It suffers friction
If a moving body comes to rest, it has definitely suffered retardation. It is only possible when a retarding force acts on the body.

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