a = (Vf-Vo) / t = -4.6m/s^2,
(0-8.2) / t = -4.6,
-8.2 / t = -4.6,
t = -8.2 / -4.6 = 1.78s.
when the shuttle bus come to a sudden stop to avoid hitting a dog, it decelerates uniformly at 4.6 m/s^2 as is slows from 8.2 m/s to 0 m/s. How long does it take for the acceleration for the bus. Answer in units of s
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