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A flywheel of mass 4 kg has a radius of ...

A flywheel of mass 4 kg has a radius of gyration of 0.1 m . If it makes 4 revolutions/sec , then its rotational K.E. is
`("use "pi^(2)=10)`

A

8 J

B

6.4 J

C

12.8 J

D

16 J

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