Q31: Figure P31.31 shows a bar of mass m = kg that can slide without friction on a pair of rails sepa- rated by a distance , l= m and located on an inclined plane that makes an angle u = with respect to the ground. The resistance of the resistor is R = V and a uniform magnetic field of magnitude B = T is directed downward, perpendicular to the ground, over the entire region through which the bar moves. With what constant speed v does the bar slide along the rails?
pi =
g =