If you push with a power of 20 Watts on a 150 Newton object, how long would it take to push it over the 4.3 m?

Question

If you push with a power of 20 Watts
on a 150 Newton object, how long would
it take to push it over the 4.3 m?

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Ngọc Khuê 3 years 2021-09-05T14:33:40+00:00 1 Answers 4 views 0

Answers ( )

  1. thienthi
    0
    2021-09-05T14:35:20+00:00
    Reply

    Answer:

    32.25 s

    Explanation:

    From the question,

    P = W/t………….. Equation 1

    Where P = Power, W = work done, t = time.

    But

    W = F×d…………….. Equation 2

    Where F = force and d = distance

    Substitute equation 2 into equation 1

    P = F×d/t…………… Equation 3

    make t the subject of euqation 3

    t = (F×d)/P…………. Equation 4

    Givn: F = 150 N, d = 4.3 m, P = 20 watts.

    Substitute these values into equation 4

    t = (150×4.3)/20

    t = 32.25 s

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