SOLUTION: A train moving at 12 m/s accelerates to 36 m/s over a distance of 8.0 km. (A) what is the train's acceleration? (B) how much time does it take the train to reach 36 m/s? (C)

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Question 1184685: A train moving at 12 m/s accelerates to 36 m/s over a distance of 8.0 km.
(A) what is the train's acceleration?
(B) how much time does it take the train to reach 36 m/s?
(C) what is the average velocity of the train?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
A train moving at 12 m/s accelerates to 36 m/s over a distance of 8.0 km.
(A) what is the train's acceleration? 


Change 8.0 km to 8000 m so we don't mix km's with m's


An acceleration of 0.072 m/s².

(B) how much time does it take the train to reach 36 m/s?
 



333.3... seconds, divide by 60, 5.556 minutes

(C) what is the average velocity of the train?


average speed = 24 m/s

Edwin