A "railgun" accelerates a projectile using an electric current circulating through two parallel rails and the projectile itself. If the force on the 1.7?kg projectile is a constant 5.40 MegaNewton over an interval of 1.45 milliseconds,
a. What is the impulse on the projectile?
b. What is the velocity of the projectile relative to the speed of sound (343 m/s)?
c. What is the kinetic energy of the projectile?