Physics

Problem

A train moving at

90\,\text{km/h}

applies its brakes and comes to a stop in

400\,\text{m}

while decelerating uniformly. What is the magnitude of the train’s acceleration during this interval? a)

1.6\,\text{m/s}^2

3.1\,\text{m/s}^2

0.78\,\text{m/s}^2

0.39\,\text{m/s}^2