A magnetic gun is made as shown in the Figure. Two cylindrical conductors of diameter a (rails) and separated a distance d between centers are shorted by a conducting projectile that is free to move along the rails. When a current is applied, the magnetic flux density produced by the current in the conductors generates a force on the projectile. a. Given a = 10 mm, d = 40 mm, and I = 100,000 A, what is the force on the projectile? b. If the projectile has a mass of 100 g, calculate the acceleration and the exit velocity of the projectile for rails 5 m long with the projectile starting at one end and exiting the other. Projectile B Axial view Rail Rail a t d Rail Projectile Cross section