A 0.910 kg snowball is fired from a cliff 9.17 m high with an initial velocity of 19.4 m/s, directed 48.0° above the horizontal. (a) Using energy techniques, find the speed of the snowball as it reaches the ground below the cliff. What is that speed (b) if the launch angle is changed to 48.0° below the horizontal and (c) if the mass is changed to 2.70
