SOLUTION: The breaks of a car moving at 20m/s are suddenly applied and a car comes a stop in 6 seconds. What is the acceleration?

Question 468788: The breaks of a car moving at 20m/s are suddenly applied and a car comes a stop in 6 seconds. What is the acceleration?
Found 2 solutions by rfadrogane, ccs2011:
Answer by rfadrogane(214) (Show Source): You can put this solution on YOUR website!
Solution,
a = v/t, where a - an acceleration, v - velocity, t - time
a = 20/6
a = 3.333 m/s^2 <-----answer

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Answer by ccs2011(207) (Show Source): You can put this solution on YOUR website!
Acceleration is defined as change in velocity over change in time.
Change in velocity is from 20 to 0 or -20
Change in time is 6
Thus acceleration is -20/6 which can be reduced to -10/3.
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