You push a box of mass 23.4 kg with your car up to an icy.f hill slope of irregular shape to a height 4.5 m. The box has a speed 12.2 mfs 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 ies off the top of the hill? H ) what is the mathematical form of the velocitil:r of the heavier box just before hitting the ground? {n = ?+ i (c) What is the physical form of the velocity of the heavier box just before hitting the ground? =EE+Em