Acar is traveling at 30 m/s in a straight line. the drive applies the brakes for 3 seconds and the car slows down to 12 m/s. what is the acceleration of the car?

The answer to your question is: -6m/s²

Explanation:

Data

vo = 30 m/s

vf = 12 m/s

t = 3 s

a = ?

Formula

vf = vo + at

a = (vt - vo) / t

Process

                a = (12 - 30) / 3                substitution

                a = -18 / 3                         simplify

                a = -6 m/s²                        result, is negative because the car

                                                          is slowing down.

an obstruction

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