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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A body having a moment of inertia about its axis of rotation equal to is rotating with angular velocity of . Kinetic energy of this rotating body is same as that of a body of mass 27 kg moving with a velocity . The value of is

Answer: (A)

Solution

(1/2)(3)(3)² = 13.5 J = (1/2)(27)v² gives v² = 1, v = 1 m/s; 0.5, 2

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Question ID VK-040770