Laws Of Motion Question 7
Question 7 - 2024 (27 Jan Shift 2)
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 $60^{\circ}$ with the horizontal, the weight experienced by the man is :
(1) $6 kg$
(2) $12 kg$
(3) $3 kg$
(4) $6 \sqrt{3} kg$
Show Answer
Answer: (3)
Solution:
Torque about $O=0$
$120\left(\frac{L}{2} \cos 60^{\circ}\right)-N _2 L=0$
$N _2=30 N$
