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9 July, 11:29

A driver of a car hits its brakes and begins to decelerate. If the velocity changes from 60 m / s to 20/m in 6 s, what is the deceleration of the car?

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  1. 9 July, 12:30
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    Answer: - 6.67 m/s²

    Explanation:

    Given that,

    Initial velocity of car (Vi) = 60 m/s

    Final velocity of car (Vf) = 20 m/s

    Time taken (T) = 6 seconds

    Deceleration (A) = ?

    Deceleration is the rate of change of velocity per unit time as the car prepares to rest (slows down)

    i. e Deceleration = (Vf - Vi) / T

    A = (20 m/s - 60km/s) / 6 seconds

    A = - 40 m/s / 6 seconds

    A = - 6.67 m/s² (The negative sign indicates that the car is slowing down)

    Thus, the deceleration of the car is - 6.67m/s²
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