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To explain why he seems to hang in the air, calculate the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.

v = u + at

s = ut + 1/2at^2

The wording of this question is really confusing me. So I need to calculate the ratio of the time he is above ymax/2 (t1) : the time it takes him to go from the floor to ymax/2 (t2)? So its just the ratio t1:t2?