Rotational MotionHard

Question

Two rotating bodies have same angular momentum but their moments of inertia are I1 and I2 respectively (I1 > I2). Which body will have higher kinetic energy of rotation : -

Options

A.First
B.Second
C.Both will have same kinetic energy
D.Not possible to predict

Solution

K. E. =
Angular momentum is same
∴ ∴ I1 > I2 ⇒ (KE)I < (KE)II

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