Four different 1 kg objects released from a point 5 m above the ground and later hit the ground.   Assume air resistance is negligible.        A is dropped                                                                                       B is shot horizontally at 20 m/s      C is released from rest on a 10-m long slippery ramp                D is shot upward at 20 m/s, 45°   Answer the following questions not including the ground: Which has the biggest value of the work of gravity done on it? Which has the biggest value of the change in potential energy? Which has the biggest value of the change in kinetic energy? Which has the biggest value of its final kinetic energy? Explain      2. Which, if any, of your answers change if you include the ground

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