Homework Help: Distance and time between 2 train stations

1. Sep 5, 2008

sktgurl930

1. The problem statement, all variables and given/known data
A light-rail train going from one station to the next on a straight section of track accelerates from rest at 2.27 m/s2 for 15.7 s/ It then proceeds at constant speed for 1346 m before slowing down at 2.2 m/s2 until it stops at the station. What is the distance between the stations? and How much time does it take the train to go between the stations?

2. Relevant equations
I figured if i used A=v/t i could get v which i could plug into V=x/t and then get X being the distance in the start and then the distance in the middle would just be 1346 since it was given . having trouble figuring out how to get the last one

and for the time
i would think to use Δt=Δv/a

3. The attempt at a solution
ok so i got V= 35.639, and X to equal 559.5323
would the formula to find the stopping distance be Vf^2-Vi^2/2*(-2.2)????

2. Sep 5, 2008

LowlyPion

Yes. Looks like you are on the right track.

I think your first distance is off though by a factor of 2.

3. Sep 5, 2008

sktgurl930

for my distance i get 2194.2001 m
and they said it was wrong so where do you think i went wrong??

4. Sep 5, 2008

LowlyPion

I think your first distance is off though by a factor of 2. Did you catch my quick edit?

5. Sep 5, 2008

sktgurl930

lol no but thanks for helping me out ur really good at this
i got it now

Thank u soo much

6. Sep 5, 2008

LowlyPion

Happy to help.