A shell is launched at angle 62° above the horizontal with
initial speed 30 m/s. It follows a typical projectile-motion
trajectory, but at the top of the trajectory, it explodes into two
pieces of equal mass. One fragment has speed 0 m/s immediately
after the explosion, and falls to the ground. How far from the
launch-point does the other fragment land, assuming level terrain
and negligible air resistance?