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A wheel 2 kg having practically all the ...

A wheel 2 kg having practically all the mass concentrated along the circumference of a circle of radius 20 cm is rotating on its axis with angular velocity of 100 rad/s, then the rotational kinetic energy of wheel is

A

4 J

B

70 J

C

400 J

D

800 J

Text Solution

Verified by Experts

The correct Answer is:
C
`KE = (1)/(2) I omega^(2)`
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