A heavy iron bar of weight 12 kg is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle 60° with the horizontal, the weight experienced by the man is :
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Question

A heavy iron bar of weight 12 kg is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle 60° with the horizontal, the weight experienced by the man is :

G1 Physics · Accepted Answer

Image Taking torque about O: 120 × (L/2) × cos60° - N₂L = 0 ⇒ N₂ = 30 N Hence the weight experienced by the man = 3 kg.