14.In high-speed motion through air, the resisting force is approximately  F = cv2 . For a human body fallingthrough air in a spread-eagle position, c is about 0.25kg/m. An 80kg sky diver jumps out of an airplane andreaches terminal speed before opening the parachute. What is the terminal speed?
(A)49m/s
(B)56m/s
(C)72m/s
(D)84m/s
(E)98m/s



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