Acceleration. linear motion. i'm stuck

[Run Haridan]

acceleration. linear motion. I'm stuck!

Homework Statement

a train moves at a velocity of 60 m s^-1 and stops after a distance of 600m. what is its deceleration?

Homework Equations

v=s/t

The Attempt at a Solution

this is my working:
u= 0 m s^-1
v= 60 m s_-1
s= 600 m

v=s/t
60=600/t
t=10 s

...and I'm stuck here. please help!

 

[rl.bhat]

The velocity is not uniform. So you can't use v = s/t. And here initial velocity is 60 m/s and final velocity is 0. Use appropriate kinamatic formula which relates initial velocity, final velocity , acceleration and displacement.

 

[Run Haridan]

what formula? tell me and i'll try to work it out!

 

[rl.bhat]

v^2 - u^2 = 2as

 

[harvellt]

My favorite for finding acceleration is a($$\Delta$$x)=(1/2)($$\Delta$$V²)