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A wheel of mass 10 kg and radius of gyra...

A wheel of mass 10 kg and radius of gyration 50 cm is rotating at 300 rpm. Then, the rotational kinetic energy of the wheel is

A

625J

B

1000J

C

1250J

D

1500J

Text Solution

Verified by Experts

The correct Answer is:
C
`"Rotational K.E. "=(1)/(2)Iomega^(2)=(1)/(2)MK^(2)xx4pi^(2)n^(2)`
`2pi^(2)n^(2)MK^(2)=2xx10xx25xx10xx(1)/(4)=1250J`
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