I need help with the following question about electromagnetism

In the gure on the right, an ideal conductor rod is rolling down a slope while in contact with two tracks on the slope. The slope is not conducting. The tracks have negligible resistance and zero friction. At the end of the slope, the two tracks are connected by a resistor R. A uniform magnetic eld I? is in the vertical down direction in the entire space. Suppose that the separation between tracks is L, the slope angle is 6 above the horizontal direction, and the mass of the rod is m. 3) Find the magnitude and the polarity of the emf generated by the rod if the rod is rolling at speed 1: down the slope. b) Find the direction and magnitude of the magnetic force on the rod when the rod is rolling at speed 12 along the slope. c) Find the terminal speed of the rod. (\"Terminal speed" is the speed at which the net force on the object reaches zero.)