Question: Two stiff parallel wires a distance l apart in a horizontal plane act as rails to support a light metal rod of mass m (perpendicular

Two stiff parallel wires a distance l apart in a horizontal plane act as rails to support a light metal rod of mass m (perpendicular to each rail), Fig 20-66, A magnetic field B, directed vertically upward (outward in the diagram), acts throughout, At t = 0, wires connected to the rails are connected to a constant current source and a current l begins to flow through the system. Determine the speed of the rod, which starts from rest at t = 0, as a function of time (a) Assuming no friction is between the rod and the rails,
(b) If the coefficient of friction is μk.
(c) Does the rod move east or west if the current through it heads north?

North BO O O O O O West I East BO O O O O South

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