A device called a railgun uses the magnetic force on currents tolaunch projectiles at very high speeds. An idealized model of arailgun is illustrated in (Figure 1). A 1.2 V power supply isconnected to two conducting rails. A segment of copper wire, in aregion of uniform magnetic field, slides freely on the rails. Thewire has a 0.61 m? resistance and a mass of 9.0 g. Ignore theresistance of the rails. At some moment, the power supply isswitched on.What will be the wire's speed after it has slid adistance of 1.0 mm?

1.2 V X X X 15 cm x X X xax x X X X X X X X X X X xx X X B = 0.80 T