Modeling with First Order Equations [closed]

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.

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closed as off-topic by Brandon Enright, John Rennie, centralcharge, Emilio Pisanty, Kyle KanosFeb 6 '14 at 14:00

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A ball with a 15-kg ass? – 6005 Feb 6 '14 at 3:43
fixed it; i meant mass – user104922 Feb 6 '14 at 3:46
This might be interesting if you are looking for an analytical solution. – fibonatic Feb 6 '14 at 8:32