1. A train leaves a station from rest with a constant acceleration of 0.3m/s2. It reaches a maximum speed after 3 minutes and maintains this speed for a further 5 minutes, when it slows down with a deceleration −2 m/s2 until it comes to rest at the next station. How far apart are the stations? 2. s=1/2(a)(t)^2 s2-s1 or s1-s2 not sure. 3. The attempt at a solution: a1=0.3ms^-2 t1=180s a2=-2ms^-2 t2=300s Then I used the s=1/2at^2 formula and found that s1=4860m and s2=-90000m This is the part I'm stuck on is it s2-s1 or s1-s2 to find how far apart the stations are? When I use the s2-s1 it gives me a negative value and I think there is no such thing as a negative distance.