Suppose that the paratrooper of Problem 22 falls freely for 30 s with = 0.00075 before

Suppose that the paratrooper of Problem 22 falls freely for 30 s with ρ = 0.00075 before opening his parachute. How long will it now take him to reach the ground?

Problem 22

Suppose that ρ =  0.075 (in fps units, with g = 32 ft/s²) in Eq. (15) for a paratrooper falling with parachute open. If he jumps from an altitude of 10,000 ft and opens his parachute immediately, what will be his terminal speed? How long will it take him to reach the ground?

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dv dt = -8 + pv² = 8 (1-2v²). = -8 (15)