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15 January, 01:27

Grace pushes her foot against the wall with a force of 35 N while she stands

on a skateboard. Her mass, including the skateboard, is 55 kg. What is her

rate of acceleration?

A. 1.6 m/s2

B. 0.64 m/s2

C. 90 m/s2

D. 20 m/s

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Answers (1)
  1. 15 January, 04:53
    0
    The correct answer is B. 0.64 m/s²

    Explanation:

    According to the Newton's Second law of motion acceleration of an object by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force.

    Mathematically,

    F ∝ a

    F = ma

    Given dа ta:

    Force = F = 35 N

    Mass = m = 55 kg

    acceleration = a = ?

    F = ma

    a = F/m

    a = 35/55

    a = 0.64 m/s²
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