A pulley with radius R and rotational inertia I is free to rotate on a horizonta

Question

A pulley with radius R and rotational inertia I is free to rotate on a horizontal fixed axis through its center. A string passes over the pulley. A block of mass m1 is attached to one end and a block of mass m2, is attached to the other. At one time the block with mass m1 is moving downward with speed v. If the string does not slip on the pulley, the magnitude of the total angular momentum, about the pulley center, of the blocks and pulley, considered as a system, is given by:
A. (m1 – m2)vR + Iv/R
B. (m1 + m2)vR + Iv/R
C. (m1 – m2)vR – Iv/R
D. (m1 + m2)vR – Iv/R
E. none of the above

Explanation / Answer

option B

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