SOLUTION: A car traveling at 20 m/s applies the brakes and uniformly comes to rest after covering 50 m. How long does it take? What is the acceleration?

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Question 350546: A car traveling at 20 m/s applies the brakes and uniformly comes to rest after covering 50 m. How long does it take? What is the acceleration?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
V^2 = v^2 + 2 a s


0^2 = 20^2 + 2 a (50)


a = -4 m/(s^2)


V = v + a t


0 = 20 + (-4)t


t = 5 sec