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Question 30440
JEE Physics · Medium

Work, Power and Energy: Energy — Conceptual MCQ

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Energy — ConceptualMediumQuestion 30440

Question

Which of these is true for a body moving at constant velocity on a rough horizontal surface?
  1. A
    Work by applied force = 0
  2. B
    Work by friction = 0
  3. C
    Work by applied force = −Work by friction
    Correct
  4. D
    Net work done on body = KE

Correct answer

Work by applied force = −Work by friction

Explanation

At constant velocity, net work = 0 = W_applied + W_friction. So W_applied = −W_friction.

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