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25 July, 17:32

A 42 kg object goes from rest to 23 m/s, what is the magnitude of the force if it accelerates in. 67 seconds?

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Answers (2)
  1. 25 July, 20:00
    0
    Force is equated as the product of mass and acceleration (F = ma). Since mass (m = 42kg) is already given, we only need to look for acceleration.

    Acceleration can be obtained by dividing velocity by time. From that, we substitute the given values of t =.67s and v = 23m/s

    a = v / t

    a = (23m/s) /.67s

    a = 34.33 m/s^2

    Since we now have the value of a, we substitute it to the formula for force:

    F = 42kg x 34.33 m/s^2

    F = 1441.8 N
  2. 25 July, 21:17
    0
    Force = mass x acceleration

    we need 1st to get the acceleration

    acc = velocity / time

    acc = 23 / 0.67

    acc = 34.33 m/s^2

    by subs. in the first law

    F = 34.33 * 42

    Force = 1441.79 N
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