Some students are discussing why a simple Atwood machine accelerates. Jane says that because of the unequal masses, gravity exerts a constant external torque on the two-mass and pulley system and thus its total angular momentum increases at a constant rate. Is Jane's explanation a valid one?

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The Answer of Some students are discussing why a simple Atwood machine accelerates. Jane says that because of the unequal masses, gravity exerts a constant external torque on the two-mass and pulley system and thus its total angular momentum increases at a constant rate. Is Jane's explanation a valid one?

Some Students Are Discussing Why a Simple Atwood Machine Accelerates