Physics
posted by Matt .
A 1.50 kg snowball is fired from a cliff 13.0 m high with an initial velocity of 14.0 m/s, directed 41.0° above the horizontal.
(a) Using energy techniques, rather than techniques of Chapter 4, find the speed of the snowball as it reaches the ground below the cliff.
m/s
(b) What is that speed if, instead, the launch angle is 41.0° below the horizontal?
m/s
(c) What is that speed if the mass is changed to 2.50 kg
m/s

Please show your work. Someone will ne glad to assist you.