What is the acceleration of the bar

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Q1. A 2.60- metal bar, 1.50 long and having a resistance of 10.0 rests horizontally on conducting wires connecting it to the circuit. The bar is in a uniform, horizontal, 1.60- magnetic field and is not attached to the wires in the circuit.

What is the acceleration of the bar just after the switch S is closed?

Q2. What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}?

Reference no: EM138052

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