a baseball of a mass 0.173kg is thrown from the roof of a building 30.8m above the ground, with a initial velocity of 13.2m/s at an angle of 74 degrees above the horizontal.
A) what is the max height the ball reaches
B) how much work is done by gravity as the ball moves from the roof to max height .
C) what is the speed of the ball as it hits the ground.