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If a disc of mass 400 gm is rolling on a...

If a disc of mass 400 gm is rolling on a horizontal surface with uniform speed of 2 m/s, then its rolling kinetic energy will be

A

0.12 J

B

1.2 J

C

120 J

D

12 J

Text Solution

Verified by Experts

The correct Answer is:
B
`KE_("rolling")=(1)/(2)mv^(2)(1+(K^(2))/(R^(2)))`
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