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The two blocks, m1 = 2.6 kg and m2 = 4.2, in the figure below are...

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Physics

The two blocks, m1 = 2.6 kg andm2 = 4.2, in the figure below are connected bya massless rope that passes over a pulley. The pulley is 12 cm indiameter and has a mass of 2.0 kg. As the pulley turns, friction atthe axle exerts a torque of magnitude 0.55 N · m. If the blocks arereleased from rest, how long does it take the 4.2 kg block to reachthe floor from a height of h = 1.0 m? (Note: If yourrandom numbers do not create movement between the masses enter 0for your answer.)

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4.3 Ratings (489 Votes)
The weight of the 49 kg block produces a torque on the pulley Torque 1 42 98 006 The weight of the 32 kg block produces a torque on the pulley in the opposite direction of Torque 1 Torque 2 26 98 006 Since Torque 1 is greater than Torque 2 the pulley will rotate in the direction of Torque 2 The torque caused by the friction force must be in the opposite direction of the rotation of the pulley    See Answer
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