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8 June, 23:00

If an object starts at rest and moves 60 meters north along a straight line for 2 seconds, what is its average velocity?

Question 5 options:

a) 120 m/s

b) 30 m/s

c) 60 m/s

d) 30 m/s, north

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Answers (1)
  1. 9 June, 02:26
    0
    Answer is d 30 m/s, North

    Given: Distance d = 60 m; Time t = 2 seconds

    Required: Average Velocity Vave. Vi + Vf/2

    Formula: d = 1/2 at² derive acceleration a = ? and a = Vf - Vi/t

    a = 2d/t²

    a = 1/2 (60 m) / (2 s) ²

    a = 30 m/s²

    Solve for final Velocity Vf = ?

    a = Vf - Vi/t

    Vf = at Since Initial Velocity is zero

    Vf = (30 m/s²) (2 s)

    Vf = 60 S

    For average velocity Vave. = Vi + Vf/2

    Vave. 0 + 60 m/s/2

    Vave = 30 m/s North.
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