A ball rolls from x=-5 to x=32.4 m in 8.9 seconds. What was it’s average velocity

Question

A ball rolls from x=-5 to x=32.4 m in 8.9 seconds. What was it’s average velocity

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Sigridomena 4 years 2021-07-26T08:25:30+00:00 2 Answers 37 views 0

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  1. diemkieu
    0
    2021-07-26T08:27:20+00:00
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    Answer:

    v = 4.20m/s

    Average velocity is 4.20m/s

    Explanation:

    Average velocity is the change in displacement per unit time;

    v = ∆x/t

    Given;

    ∆x = 32.4 – (-5) = 37.4 m

    t = 8.9 seconds

    Substituting the values;

    v = 37.4m/8.9s

    v = 4.20m/s

    Average velocity is 4.20m/s

  2. thanhcong
    0
    2021-07-26T08:27:20+00:00
    Reply

    Answer:

    4.157 m/s

    Explanation:

    Average velocity: This can be defined as the ratio change in position to time interval. The S.I unit of average velocity is m/s

    The expression for average velocity is given as,

    V = Δx/t………….. Equation 1

    Where V = average velocity, Δx = change in position on the x- axis, t = time.

    But,

    Δx = x₂-x₁……….. Equation 2

    Substitute equation 2 into equation 1

    V = (x₂-x₁)/t……………. Equation 3

    Given: x₂ = 32.4 m, x₁ = -5 m, t = 8.9 s

    Substitute into equation 3

    V = [32.4-(-5)]/8.9

    V = (32.4+5)/8.9

    V = 37.4/8.9

    V = 4.157 m/s

    Hence the average velocity = 4.157 m/s

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )