A) 8
B) 4
C) 2
D) 1
Correct Answer: B
Solution :
\[\frac{1}{2}I{{\omega }^{2}}=8J\] \[\frac{1}{2}\times \frac{1}{2}m{{r}^{2}}{{\omega }^{2}}=8\] \[\frac{1}{4}\times 2\times {{(1)}^{2}}\times {{\omega }^{2}}=8\] \[{{\omega }^{2}}=16\] \[\omega =4rad/s\] \[L=I\omega \] \[=\frac{1}{2}m{{r}^{2}}\omega \] \[=\frac{1}{2}(2)\times {{(1)}^{2}}\times r\] \[=4\,Js\]You need to login to perform this action.
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