Question:
The angular momentum of a rotating body changes from $A_{0}$ to $4 A_{0}$ in $4$ minutes. The torque acting on the body is :
The angular momentum of a rotating body changes from $A_{0}$ to $4 A_{0}$ in $4$ minutes. The torque acting on the body is :
Updated On: Jun 7, 2022
- $ 3/4A_{0}$
- $ 4A_{0}$
- $ 3A_{0}$
- $ 3/2A_{0}$
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The Correct Option is A
Solution and Explanation
Torque $\tau=\frac{d L}{d t}=\frac{\left(4 A_{0}-A_{0}\right)}{4}$
$=\frac{3 A_{0}}{4}$
$=\frac{3 A_{0}}{4}$
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- The few common examples of rotational motion are the motion of the blade of a windmill and periodic motion.