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19 June, 11:52

A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people would it take to run a 4.00-kW electric clothes dryer?

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  1. 19 June, 12:04
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    40 persons

    Step-by-step explanation:

    Data provided:

    The power put out by a single person = 100 W

    Power required by an electric clothes dryer = 4.00 kW = 4000 W

    Thus,

    The number of persons required to produce 4000 W of power

    = (Power required) / (power produced per person)

    or

    = (4000 W) / (100 W / person)

    or

    = 40 persons

    Hence, the number of persons required is 40
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