A 2 kg body falls from rest through 10 m and reaches 12 m/s. The work done against air resistance is (g = 9.8):

  1. 196 J
  2. 52 J
  3. 26 J
  4. 104 J
Answer

B) 52 J

Loss of PE = mgh = 196 J; gain of KE = 144 J; work against friction = 52 J. SLO P-11-B-32 · Application

Physics MCQ · More Work and Energy MCQs · Practise