A heavy iron bar, of weight W is having its one end on the ground and the other on the shoulder of a person. The bar makes an angle θ with the horizontal. The weight experienced by the person is:
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A heavy iron bar, of weight W is having its one end on the ground and the other on the shoulder of a person. The bar makes an angle θ with the horizontal. The weight experienced by the person is:

G1 Physics · Accepted Answer

Take moments about the point of contact with the ground. If R is the vertical reaction at the shoulder and L is the length of the bar: R(L cosθ) = W(L/2 cosθ) Cancel L cosθ: R = W/2 Hence, the weight experienced by the person is W/2.