Asked in PMC Practice Test 29 (2021) 2021

Work is done by the applying force when

Correct answer: C. applied force generated motion

  • A. applied force is variable
  • B. applied force is perpendicular to the motion
  • C. applied force generated motion
  • D. applied force is constant

Explanation

Work is equal to the product of force and displacement. So, work is only done by the applied force when this force produces motion.

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About Work

Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.

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