NEET | 2018Rotational MotionHard

Question

A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt : (Kt + Kr) for the sphere is

Options

A.

7 : 10

B.

5 : 7

C.

10 : 7

D.

2 : 5

Solution

If Icn = nMR2
Isolid =25mR2                       n=25K.ERotK.ETotal=nn+1K.ETransK.ETotal=nn+1=125+1=57

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