A 15.0-g conducting rod of length 1.30 m is free to slide downward between two vertical rails without friction. The ends of the rod maintain electrical contact with the rails. The rails are connected to a 7.20−Ω resistor, and the entire apparatus is placed in a 0.540−T uniform magnetic field. Ignore the resistance of the rod and rails. What is the terminal velocity of the rod? m/s
