A) 250 \[{{\pi }^{2}}\]
B) 100\[{{\pi }^{2}}\]
C) 5\[{{\pi }^{2}}\]
D) 0
E) 36\[{{\pi }^{2}}\]
Correct Answer: A
Solution :
Here \[m=5\,kg,\,\,r=i\,m\] \[w=\frac{300}{60}rps=5\,rps\] \[=5\times 2\pi \,rods\] \[K.E.=\frac{1}{2}m{{v}^{2}}\] \[=\frac{1}{2}m\,{{(rw)}^{2}}\] \[=\frac{1}{2}\times 5\,{{(1\times 10\pi )}^{2}}\] \[=250\,{{\pi }^{2}}J\]
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