An object of mass m and moment of inertia I has rotational kinetic energy K_R.Its angular momentum is: A)0.5 I/m. B)(2 IK_R)^1/2. C)(2 mK_R)^1/2. D)not given above.

Question

Quizplus · Accepted Answer

The angular momentum of an object with rotational kinetic energy K_R and moment of inertia I is given by L = (2IK_R)^1/2. (Option A is incorrect as it gives only the angular momentum for a point mass, whereas the moment of inertia takes into account the distribution of mass throughout an object. Option C is incorrect as it includes the mass of the object, which is not necessary to find the angular momentum.)

An Object of Mass M and Moment of Inertia I