A 50 kg projectile is fired over level land at an angle of 30 degrees above the horizontal with a muzzle velocity of 210 m/s. At the highest point in its trajectory it explodes into two fragments, one of twice as much mass as the other. The less massive fragment falls vertically with zero initial speed.
A) How far from the firing point does the more massive fragment land?
B) How much energy was released during the explosion?