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Friction and Surface Area of the Object

A body of mas...

Question

A body of mass $10 kg$ is kept on a rough horizontal surface. A force of $50 N$ is required to just move the body. If the body is cut into two equal parts and placed one over the other, find the force required to just move the body.

A

10 N

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B

25 N

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C

50 N

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D

100 N

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Solution

The correct option is C $50 N$
Frictional force only depend on the contact surface and is independent of area of contact. Hence force required will be the same.

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