A 0.5 kg ball thrown up at 20 m/s rises only 18 m because of air resistance (g = 9.8). The energy lost to air is:

  1. 100 J
  2. 11.8 J
  3. 0 J
  4. 88.2 J
Answer

B) 11.8 J

K0 = 100 J; mgh = 0.5 9.8 18 = 88.2 J; lost = 11.8 J. SLO P-11-B-32 · Application

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