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The magnetic drag force due to eddy currents on a conducting plate moving during a magnetic field means that a plate dropped vertically among the poles of a magnet will reach a terminal speed, just like an object falling in air. Imagine that we drop along strip of aluminium whose mass is 0.60 kg and whose thickness is 0.5 cm so that it falls vertically among the poles of a horseshoe magnet. If the poles are round and have a diameter of 5 cm, and the magnetic field strength among the poles is 0.2 T, what is the plate's terminal speed?
(Hint: Remember that the terminal speed is the speed where the drag force balances the gravitational force on the object: the net force on the object will then be zero and it will no longer increase its downward speed.)
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