JEE Mains · Physics · STD 11 - 6. system of particles and rotational motion
A heavy iron bar of weight \(12 \mathrm{~kg}\) is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle \(60^{\circ}\) with the horizontal, the weight experienced by the man is :
- A \(6 \mathrm{~kg}\)
- B \(12 \mathrm{~kg}\)
- C \(3 \mathrm{~kg}\)
- D \(6 \sqrt{3} \mathrm{~kg}\)
Answer & Solution
Correct Answer
(C) \(3 \mathrm{~kg}\)
Step-by-step Solution
Detailed explanation
Torque about \(\mathrm{O}=0\) \( 120\left(\frac{\mathrm{L}}{2} \cos 60^{\circ}\right)-\mathrm{N}_2 \mathrm{~L}=0 \) \( \mathrm{~N}_2=30 \mathrm{~N}\)
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