A device called a railgun uses the magnetic force on currents to launch projectiles at very high speeds. An idealized model of a railgun is illustrated in (Figure 1). A 1.2 V power supply is connected to two conducting rails. A segment of copper wire, in a region of uniform magnetic field, slides freely on the rails. The wire has a 0.61 mo2 resistance and a mass of 6.0 g. Ignore the resistance of the rails. At some moment, the power supply is switched on. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution