You push a box of mass 23.4 kg with your car up to an icy hill slope of irregular shape to a height 4.5 m. The box has a speed 12.2 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) to a flat area before coming to a rest when hitting a box of mass 66 kg. The heavier box then falls off a sheer cliff to the ground (with no drag). (a) What is the speed of the heavier box as it flies off the top of the hill? 3.364 m/s X (b) What is the mathematical form of the velocity of the heavier box just before hitting the ground? V = [ y + (c) What is the physical form of the velocity of the heavier box just before hitting the ground? V = y + 2 )