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Kinetic Friction

A man walks o...

Question

A man walks on rough horizontal surface towards East direction and a boy walks on rough horizontal surface towards West direction. The frictional force on man is $f_{1}$ and on boy is $f_{2}$ , then

f_{1}

must be towards west

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f_{2}

must be towards East

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f_{1}

must be towards East

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f_{1}

and

f_{2}

are in same direction

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Solution

The correct option is C $f_{1}$ must be towards East
While walking, the friction supports the motion of person. Hence in the case of man, $f_{1}$ must be towards East and in case of boy, $f_{2}$ must be towards West.

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