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20 July, 23:17

When a driver presses the brake pedal, his car stops with an acceleration of - 2.1 m/s2. How far will the car travel while coming to a complete stop if its initial speed was 13 m/s?

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  1. 20 July, 23:43
    0
    The answer to the question is 25
  2. 20 July, 23:44
    0
    The kinematic equation that will be used for this problem is:

    Vf^2 = V1^2 + 2 * a * d, where,

    Vf = final velocity = 0 m/s

    V1 = initial velocity = 13 m/s

    a = acceleration = - 2.1m/s^2

    d = distance traveled = ?

    Inserting the given values, the equation becomes

    0^2 = 13^2 + 2 * - 2.1 * d

    0 = 169 + - 4.2*d

    169 = 4.2 * d

    169/4.2 = d = 40.24

    Therefore, d = 40.24 M.
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