Question: A 3 2 0 g ball and a 4 0 0 g ball are attached to the ends of a string that goes over a

A 320 g ball and a 400 g ball are attached to the ends of a string that goes over a pulley with a radius of 8.7 cm. Because of friction in its axle, the pulley does not begin to rotate. What is the magnitutde of the frictional torque at the axle of the pulley if the ystem remains at rest when the balls are released?

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