A) 1
B) 2
C) 4
D) 8
Correct Answer: C
Solution :
Kinetic energy o rotating body \[K=\frac{1}{2}I{{\omega }^{2}}=62.8\,J\] Angular momentum, \[L=I\omega \] \[=\left( \frac{1}{2}I{{\omega }^{2}} \right)\times \frac{2}{\omega }\] \[=\frac{62.8\times 2}{(2\times \pi \times 300/60)}\] \[=4\,kg\,{{m}^{2}}{{s}^{-1}}\]You need to login to perform this action.
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