A 1.60 kilogram snowball is fired from a cliff 11.9 meter high with an initial velocity of 13.3 m/s, directed 47.0 degree above the horizontal.
(a) Using energy techniques, obtain the speed of the snowball as it reaches the ground below the cliff.
(b) Determine what is that speed if the launch angle is changed to 47.0 degree below the horizontal? and
(c) Determine what is that speed if the mass is changed to 3.50 kilogram?