A mass M hangs on a massless rod of length l which rotates at a constant angular frequency. The mass M moves at a steady speed in a circular path of constant radius. Assume that the system is in steady circular motion with constant angular velocity ω. The angular momentum of M about point A is LA which lies in the positive z direction and the angular momentum of M about B is LB. The correct statement for this system is:

Question

A mass M hangs on a massless rod of length l which rotates at a constant angular frequency. The mass M moves at a steady speed in a circular path of constant radius. Assume that the system is in steady circular motion with constant angular velocity ω. The angular momentum of M about point A is  LA which lies in the positive z direction and the angular momentum of M about B is LB. The correct statement for this system is:

Infinity Learn · Accepted Answer

Angular momentum about A is constant in direction and in magnitude as well. Whereas angular momentum about B is constant in magnitude and varies in direction.LA  is constant, both in magnitude and direction.

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