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Q.

A man is running on ground the coefficient of friction between man and ground is μ . Assume that the center of mass of man moves horizontally Then which statement is incorrect :

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a

Normal reaction between man and ground is equal to weight of man

b

Direction of friction on man is in the direction of motion of man

c

Direction of friction on man is opposite to the direction of motion of man

d

Maximum acceleration of man can be μ g

answer is C.

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Detailed Solution

When a person moves on the ground he applies a force backward to get a reaction in forward direction. So frictional force acts opposite the applied fore i.e., in the forward direction.
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