You are going sky jumping over Thanksgiving weekend with your family. You are of

Question

You are going sky jumping over Thanksgiving weekend with your family. You are offered the choice of

two parachute configurations. The first is a single large hemispherical parachute of cross-sectional area

A. The second configuration is a collection of three smaller hemispherical parachutes who’s total

cross-sectional area is equal to A. Assuming the three smaller parachutes do not interact with each

other, which configuration will have the lower terminal velocity and by how much?

Explanation / Answer

F=FD-W =1/2*Cd*p*A*v^2-w=0 =>terminal vel,V=(2w/cd*p*A)^1/2 clearly V depends on 1)weight 2)area 3)density) 4)drag coeff since in second configuration gives higher drag due to less steamline motion hence cd for second config is high hence second config has lower terminal velocity ans

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