Q134. A uniform circular disc of radius R, lying on a frictionless horizontal plane, is rotating with an angular velocity ω about its own axis. An identical circular disc is gently placed on top of the first disc, coaxially. The two discs eventually acquire a common angular velocity due to friction. If I is the moment of inertia of a single disc, what is the loss in rotational kinetic energy?Physics — NUST Mock By IBAGRADS 5 — Question 134 of 200A. 1/8 Iω2B. 1/4 Iω2C. 1/2 Iω2D. Iω2Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →