Man on Ground Forces – Rankers Physics
Topic: Laws of Motion
Subtopic: Third Law of Motion

Man on Ground Forces

Assertion (A): A man standing at rest on ground. Force exerted by man on ground is equal to weight of man.
Reason (R): Earth attracts man by force \(mg\) hence by Newton's third law, man also attracts earth by same force.
 
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution:

Assertion (A) is true: the man exerts a force equal to his weight on the ground. Reason (R) is true by Newton's third law of gravitation for action-reaction. However, Reason (R) explains gravitational forces, not the contact force on the ground, so it is not a correct explanation for (A).

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