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 f1 and on boy is f2, then
A
f1 must be towards west
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B
f2 must be towards East
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C
f1 must be towards East
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D
f1 and f2 are in same direction
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Solution
The correct option is Cf1 must be towards East While walking, the friction supports the motion of person. Hence in the case of man, f1 must be towards East and in case of boy, f2 must be towards West.