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16 October, 17:08

A cars velocity changes from 100 m/s to 20 m/s in 40 seconds. What is the acceleration of the car?

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  1. 16 October, 17:33
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    Acceleration=a = unknown, since we are to find the velocity.

    Final velocity=100m/s=v

    Initial velocity=20m/s = u

    Time=40seconds.

    Mathematically:

    a=v-u/t

    substituting the givens into the equation.

    a = 100-20/40

    a=80/40

    a=2m/s²
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