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A flywheel having a radius of gyration o...

A flywheel having a radius of gyration of 2m and mass 10 kg rotates at an angular speed of `5 rad s^(-1)` about an axis perpendicular to it through its centre. The kinetic energy of rotation is

A

500 J

B

2000 J

C

1000 J

D

250 J

Text Solution

Verified by Experts

The correct Answer is:
A
`I=mK^(2)=10(2)^(2)=40 "kg-m"^(2)`
`K_(R)=(1)/(2)I omega^(2)=(1)/(2)(40)(5)^(2)=500J`
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