Suppose a person does 145 x 106 j of useful work in 875, Ask an Expert

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Suppose a person does 1.45 x 10⁶ J of useful work in 8.75 h

What is the average useful power output, in watts, of the person?

Working at this rate, how long, in seconds, will it take this person to lift 2100 kg of bricks 1.4 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output.)

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