MHT CET202415 May 2024Morning ShiftPhysicsRotational MotionActual

If the angular velocity of a body rotating about the given axis increases by 20 % , then its kinetic energy of rotation will increase by

Options

A20 %
B30 %
C44 %
D66 %

Correct answer

C. 44 %

Step-by-step solution

aligned & ₂= 120 100 ₁=1.2 ₁ & KE ₂ KE ₁ = 1 2 I ₂^2 1 2 I ₁^2 = ₂^2 ₁^2 = (1.2 ₁ )^2 ₁^2 =1.44 & KE ₂=1.44 KE ₁ & ( KE ₂- KE ₁ KE ₁ ) 100 & = ( 1.44 KE ₁- KE ₁ KE ₁ ) 100 & =0.44 100=44 % aligned

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