Question

Two coaxial discs, having moments of inertia I₁ and I₁/2,
area rotating with respectively angular velocities ω₁ and ω₁/2, about their common axes. They are brought in contact with each other and thereafter they rotate with a common angular velocity. If Eᶠ and Eᵢ are the final and initial total energies, then (Eᶠ – Eᵢ) is:
(A) (I₁ω₁²)/6
(B) (3I₁ω₁²)/8
(C) (-I₁ω₁²)/12
(D) (-I₁ω₁²)/24

Answer 1

answer

(D) (-I₁ω₁²)/24 the correct answer...

Thanks for the question....

Answer 2

$\huge\mathtt\pink{Answer}$

Option (D) (-I₁ω₁²)/24 is the correct answer.