Question

The two blocks in the figure Figure 1) are connected by a massless rope that passes over a pulley


The two blocks in the figure Figure 1) are connected by a massless rope that passes over a pulley. The pulley is 14 cm In diameter and has a mass of 2.1 kg. As the pulley turns, friction at the axle exerts a torque of magnitude 0.52 N·m. 

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Part A 

If the blocks are released from rest, how long does it take the 4.0 kg block to reach the floor? 

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