A person holds a 25 kg (250 newton) bag of cement over his head and moves it a distance of 10 m, taking 2 minutes, while another person carr

Question

A person holds a 25 kg (250 newton) bag of cement over his head and moves it a distance of 10 m, taking 2 minutes, while another person carries it on a wheelbarrow that same distance, taking 1 minute.Who does more work ? What is the power of each person?

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Diễm Kiều 4 years 2021-08-09T16:26:19+00:00 1 Answers 5 views 0

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  1. Neala
    0
    2021-08-09T16:27:45+00:00
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    Explanation:

    Assuming the 10 m distance is the vertical displacement, the work done by both people is the same.

    Work = force × distance

    W = (250 N) (10 m)

    W = 2500 J

    The power of the first person is:

    Power = work / time

    P = 2500 J / 120 s

    P = 20.83 W

    The power of the second person is:

    P = 2500 J / 60 s

    P = 41.67 W

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