A disc of mass 4 k g and of radius 1 m rolls on a horizontal surface without slipping such that the velocity of its centre of mass is 10 cm sec - 1 . Its rotational kinetic energy is

Question

A disc of mass 4 k g and of radius 1 m rolls on a horizontal surface without slipping such that the velocity of its centre of mass is 10 cm sec - 1 . Its rotational kinetic energy is, 0.005 J, 0.02 J, 0.03 J, 0.01 J

MARKS App · Accepted Answer

KE rotational = 1 2 Iω 2 KE rotational = 1 2 1 2 4 1 2 0 .1 2 KE rotational = 0 .01 J

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