A) 3 s
B) 4 s
C) 2.5 s
D) 120 s
Correct Answer: A
Solution :
Torque is defined as rate of change of angular momentum \[\therefore \] \[\tau =\frac{dJ}{dt}=\frac{d(I\omega )}{dt}\] Given,\[\tau =40\text{ }Nm,\text{ }I=5\text{ }kg-{{m}^{2}},\text{ }\omega =24\text{ }rad/s\] \[dt=\frac{d(I\omega )}{\tau }=\frac{5\times 24}{40}=3s\]You need to login to perform this action.
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