Kinematics question
Hey I was just wondering if someone could help me with the working on this...
A student, standing on the platform at Cambridge railway station, notices that the first two carriages of an arriving train pass her in 2.0s, and the next two in 2.4s. The train is decelerating uniformly. Each carriage is 20m long. When the train stops, the student is opposite the last carriage. How many carriages are there in the train?
The answer is 8 carriages, I'm just stuck with the working
Cheers
