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Understanding Power and Work Rate in Physics

Learn about power, the rate at which work is done, and how it is measured in Watts. Discover examples and calculations to understand the concept better.

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Understanding Power and Work Rate in Physics

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  1. Section 1 (cont.) Power

  2. I. Power A. The rate at which work is done.

  3. B. Power is measured in Watts (W). • Examples: • A medium-sized car engine is rated at 50,000 to 100,000 Watts • A person who weighs 220 pounds climbing a 10 foot high ladder in 5 seconds is doing work at a rate of about 600 Watts

  4. W t P It takes 100,000 J of work to lift an elevator 18 meters. If this is done in 20 seconds, what is the average power of the elevator during this time? GIVEN: WORK: W = 100,000 J t = 20 s P = ? work time P = 100,000 J 20 s P = P = 5,000 W

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