A thin ring and a disc have same mass and roll without slipping with the same linear velocity v. If the total kinetic energy of the loop is 8 J, the kinetic energy of the disc must be
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a
8 J
b
16 J
c
6 J
d
4 J
answer is C.
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Detailed Solution
During rolling total KE of loop = mv2 = 8 J Total KE of disc = 34mv2 = 348 = 6 J