A) 10 s
B) 8 s
C) 2 s
D) 4 s
Correct Answer: C
Solution :
Kinetic energy is given by \[E=\frac{1}{2}I{{\omega }^{2}},\] \[{{\omega }^{2}}=\frac{2E}{I}\] \[{{\omega }^{2}}=\frac{2\times 1500}{1.2}=2500\] \[\omega =\sqrt{2500}=50\,rad\text{/}\sec \] \[t=\frac{\omega }{\alpha }=\frac{50}{25}=2\,\sec \]You need to login to perform this action.
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