Free AP Physics C lesson

Power & Efficiency

This AP Physics C: Mechanics lesson is designed for AP Physics C self-study. It includes 1 video lesson, 3 practice questions, and an estimated completion time of 12 minutes.

Video lessons

  1. Power and Efficiency

    Watch on YouTube

Practice covered

  1. Which of the following are correct definitions of power?
  2. A machine performs 450 J of work in 15 s. Calculate the average power output (in W).
  3. A machine has a power input of 800 W and does useful work at a rate of 600 W. What is the efficiency of this machine?
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