JEE Main & Advanced
Physics
Rotational Motion
Question Bank
Self Evaluation Test - System of Particles Rotational Motion
question_answer
Two discs rotating about their respective axis of rotation with angular speeds\[2rad{{s}^{-1}}\] and\[5rad{{s}^{-1}}\] are brought into contact such that their axes of rotation coincide. Now, the angular speed of the system becomes\[4rad{{s}^{-1}}\]. If the moment of inertia of the second disc is\[1\times {{10}^{-3}}\text{ }kg\text{ }{{m}^{2}}\], then the moment of inertia of the first disc \[(in\text{ }kg\text{ }{{m}^{2}})\] is