together to the ground (with no drag) You push a box of mass 20.9 kg with your car up to an icy hill slope of irregular shape to a height 4.6 m. The box has a speed 12.7 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 sliding into a box larger box of mass 10 kg. The boxes then fall off a sheer cliff (a) What is the velocity of the pair just before hitting the ground? { Coordinate Form } V = 5.7 m/s y y+ -9.5 mis 1 2 (b) What is the velocity of the pair just before hitting the ground? { Vector Form } V = 0 m/s x ( -9.5 x y + -9.5 x 2) (c) How much does the kinetic energy change in the situation? 418.96 J (d) What is the path basis just before impact? t = 0 * + n = 0 * + 12 6 =0 * * +0 y + 0