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College Physics Homework. Please help!

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A metal bar with a length of 0.30 m and mass of 0.5 kg is free to slide (no friction) on a set of vertical rails. The rails and bar together have a resistance of 500 ohms. The rails lie in a horizontal magnetic field with a strength of 0.04 T. The mass falls under the combined influence of gravity and magnetic forces with a constant speed.

Magnitude of the force of gravity?
Magnitude of the magnetic force on the rod?
Current in the rod?
Direction of that current?
EMF on the rod?
Speed of the rod?

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