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When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.

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When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.

(a) True

(b) False

This question was addressed to me by my school teacher while I was bunking the class.

My question comes from Friction and Forces topic in portion Laws of Motion of Engineering Physics I

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The correct option is (b) False

The best I can explain: When a person walks, he pushes the ground backward with his foot. The tendency of the foot when it is in the contact of the earth is to move backward. Hence the force of friction acts in the forward direction.

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