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# Physics Homework Help? plz?

A train in Europe has an initial velocity of +50.0 m/s.

a) If while braking, the train underwent an acceleration of -2.00 m/s2 for 20.0 s,

what was the train’s braking distance?

b) What was the train’s velocity after the acceleration?

### 1 Answer

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- NCSLv 71 month agoFavourite answer
a) s = v₀t + ½at²

s = 50.0m/s*20.0s - ½ * 2.00m/s² * (20.0s)²

s = 600 m

b) v = v₀ + at = 50.0m/s - 2.00*20.0s = 10.0 m/s

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