A ring and a disc having the same mass, roll without slipping with the same linear velocity. If the kinetic energy of the ring is 8 j , Find the kinetic energy of disc (in J)A. 2 JB. 4 JC. 6 JD. 12 J

A ring and a disc having the same mass, roll without slipping with the

1.	A ring and a disc having the same mass, roll without slipping with the same linear velocity. If the kinetic energy of the ring is 8 j , Find the kinetic energy of disc (in J)A. 2 JB. 4 JC. 6 JD. 12 J
Answer» Correct Answer - C `(KE_("disc"))/(KE_("ring"))=(1+(K^(2)//R^(2))_(d))/(1+(K^(2)//R^(2))_(r ))=(1+(1)/(2))/(1+1)=((3)/(2))/(2)` `KE_("disc")=(3)/(4)xx KE_("ring")` `= (3)/(4)xx(2)/(8) = 6 J`.

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A ring and a disc having the same mass, roll without slipping with the same linear velocity. If the kinetic energy of the ring is 8 j , Find the kinetic energy of disc (in J)A. 2 JB. 4 JC. 6 JD. 12 J

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