A ball with mass 015kg is thrown upward with initial velocity 20m/s from the roof of a building 30m high. There is air resistance of magnitude v^2/1325 directed opposite to the velocity , where the velocity is measured in m/s.
a. Find the max height above the ground that the ball reaches.
b. Find the time that the ball hits the ground.
I am unsure how to set this one up.