Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6. 4 m/s2 and causes it to slow to a stop. How long does it take for the car to stop? Round your answer to the nearest tenth.

Hi there!

We can use the kinematic equation:

vf = final velocity (0 m/s, breaking to a stop)

vi = initial velocity (28 m/s)

a = acceleration (-6.4 m/s², breaking)

time (sec)

Plug in the given values and solve.

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