i have this killllerrr question i need some help on. idno what to do.. 1. The problem statement, all variables and given/known data A train is moving at a constant speed of 20ms per second along a striahgt, level track when its last carriage is released. This carriage comes to a rest after continuing for 200m along the track. the speed of the train remains constant. a.) what was the acceleration of the carriage. b.) how long did it take for the carriage to come to a rest? c.) how far ahead of the carriage was the train when the carriage stoped? 2. Relevant equations i got the first 2, using v^2 = u^2 + 2ar, and v = u + at idno how to get the last answer. 3. The attempt at a solution no idea.