A solid cylinder of mass 20 kg and radius 10 cm rotates about its axis with angular velocity 10 rad / s. The angular momentum of the cylinder about its axis is

Question

A solid cylinder of mass 20 kg and radius 10 cm rotates about its axis with angular velocity 10 rad / s. The angular momentum of the cylinder about its axis is (A) 10 Js (B) 1 Js (C) 0.1 Js (D) 5 Js

Tardigrade Admin · Accepted Answer

L =I ω=(m R2/2) ω =(20 × 0.12 × 10/2) =1 Js

Q. A solid cylinder of mass $20 k g$ and radius $10 c m$ rotates about its axis with angular velocity $10 r a d / s$ . The angular momentum of the cylinder about its axis is

10 Js

1 Js

0.1 Js

5 Js

$L = I ω = \frac{m R ^{2}}{2} ω$
$= \frac{20 \times 0. 1 ^{2} \times 10}{2}$
$= 1 J s$

Q. A solid cylinder of mass 20kg and radius 10cm rotates about its axis with angular velocity 10rad/s. The angular momentum of the cylinder about its axis is