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Work, Power and Energy: Power at Terminal Velocity MCQ

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Power at Terminal VelocityMediumQuestion 30457

Question

A skydiver (mass 70 kg) falls at terminal velocity 60 m/s. Air resistance equals weight. Power dissipated by air resistance is: (g = 10)
  1. A
    4200 W
  2. B
    42000 W
    Correct
  3. C
    420000 W
  4. D
    840 W

Correct answer

42000 W

Explanation

At terminal velocity, F_air = mg = 700 N. P = F×v = 700×60 = 42000 W = 42 kW.

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