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20 October, 21:38

A car is traveling down the interstate at 37.1 m/s. The driver sees a cop and quickly slows down. If the driver slows to 29.8 m/s in 3 seconds, what is the acceleration of the car?

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  1. 20 October, 22:58
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    a = - 2.4 ms⁻²

    Explanation:

    Given dа ta:

    Initial velocity of car = 37.1 m/s

    Final velocity of car = 29.8 m/s

    Time taken to change velocity = 3 sec

    Acceleration of car = ?

    Solution:

    Formula:

    a = Vf - V₀ / t

    Vf = Final velocity

    V₀ = Initial velocity

    a = acceleration

    t = time taken to change velocity

    Now we will put the values in formula.

    a = 29.8 m/s - 37.1 m/s / 3 s

    a = - 7.3 m/s / 3s

    a = - 2.4 ms⁻²

    Negative sign show that car is slowing down.
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