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7.7 Exercise 10

Avg difficulty 2.5

(a) What is the average useful power output of a person who does 6.00×106J6 . \text{00} \times \text{10}^{6} \text{J} of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)

OpenStax College Physics 2e, 7.7 Power, exercise 10

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.