The figure below shows a loop of wire of mass m = 0.0251 kg, width L = 0.0537 m, and resistance R = 0.494 Ω dropping out of a region of constant magnetic field of magnitude B = 1.47 T pointing into the page. As long as the top of the loop is in the magnetic field, the equation describing the speed of the loop v is given by mdvdt + vL2 B2 R = mg. Replacing the speed by the current i, this equation has the same form as that for a series RL circuit. What is the speed of the loop after t = 3.58 s?
