A 78 kg skydiver can be modeled as a rectangular "box" with dimensions 21 cm ×...

Question

Question

A 78 kg skydiver can be modeled as a rectangular "box" with dimensions 21 cm × 41 cm × 170 cm . If he falls feet first, his drag coefficient is 0.80.

What is his terminal speed if he falls feet first? Use ρ = 1.2 kg/m3 for the density of air at room temperature.

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Answer 1

Answer #1

Terminal speed, v = sqrt(2 mg/Cd p A)

V = sqrt(2 x 78 x 9.8/0.80 x 1.2 x 0.21 x 0.41)

V = 136 m/s

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Answer 2

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