E.g. A football of mass 1kg is thrown with a speed of 10m/s at an angle of 30 degrees from a horizontal plane. Take air resistance (in newtons) as 1/15 th of the speed of the ball in the exact opposite direction that the ball is traveling. How long is the ball in the air? and how far (horizontally) has it traveled at the point of landing? I understand how to figure it out if I can ignore air resistance, but how would I answer this question? I am not so much interested in the answer, but more how to figure out the answer, I have just given you that example so it gives you something to answer if you need an example.