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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Solution

Q.
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 _____. [2024]

1 6 kg

2 12 kg

3 3 kg

4 $6 \sqrt{3}$ kg

Ans.
(3)

$Torque about O = 0$

$120 (\frac{L}{2} \cos 60 °) - N_{2} L = 0$

$N_{2} = 30 N$

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