A uniform rod of mass 15 kg is held stationary with the help of a light string as shown in the figure. The tension in the string is

Question

A uniform rod of mass 15 kg is held stationary with the help of a light string as shown in the figure. The tension in the string is (A) 150 N (B) 225 N (C) 100 N (D) None of the above

Tardigrade Admin · Accepted Answer

The free-body diagram of the rod is shown in the figure. (Force exerted by the hinge on the rod are not shown.) Take torque about the hinge, T × 3-15 g × 2=0 ⇒ T=100 N

Q. A uniform rod of mass $15 k g$ is held stationary with the help of a light string as shown in the figure. The tension in the string is

$150 N$

$225 N$

$100 N$

None of the above

The free-body diagram of the rod is shown in the figure.
(Force exerted by the hinge on the rod are not shown.)
Take torque about the hinge,
$T \times 3 - 15 g \times 2 = 0$
$\Rightarrow T = 100 N$

Q. A uniform rod of mass 15kg is held stationary with the help of a light string as shown in the figure. The tension in the string is

150N

225N

100N