Rotational MotionMedium

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

Create a free account to view solution

View Solution Free
Topic: Rotational Motion·Practice all Rotational Motion questions

More Rotational Motion Questions

A uniform solid disc of mass 1 kg and radius 1m is kept on a rough horizontal surface. Two forces of magnitude 2 N and 4...A solid sphere and a hollow sphere of the same mass have the same M.I. about their respective diameters. The ratio of th...The angular velocity of a body changes from &#969;1 to &#969;2 without applying torque. The ratio of initial radius of g...One solid sphere A and another hollow sphere B are of same mass and same outer radii. Their moment of inertia about thei...A particle falls freely near the surface of the earth. Consider a fixed point O (not vertically below the particle) on t...