A300-kg piano being held by a crane is accidentally dropped from a height of 15 meters. a. what is the speed of the piano just before it hits the ground? b. how much energy is dissipated when the piano hits the ground? c. what are some indicators of this release of energy that could be observed during and shortly after the piano hits the ground? d. suppose that a parachute is used to slow the fall of the piano. i. how would the amount of kinetic energy dissipated by the ground change? explain. ii. how would the total amount of energy dissipated change? explain.