JEE Main & Advanced
Physics
Rotational Motion
Question Bank
Mock Test - Dynamics of Rigid Body
question_answer
Two discs, each having moment of inertia \[5\,kg\,{{m}^{2}}\] about its central axis, rotating with speeds 10 rad \[{{s}^{-1}}\] and 20 rad \[{{s}^{-1}}\], are brought in contact face to face with their axes of rotation coincided. The loss of kinetic energy in the process is (in J) ______ .