A train started from rest and moved with constant acceleration. At one time it was traveling 27 m/s, and 150 m farther on it was
traveling 54 m/s. Calculate (a) the acceleration, (b) the time required to travel the 150 m mentioned, (c) the time required to attain the speed of 27 m/s, and (d) the distance moved from rest to the time the train had a speed of 27 m/s.
A primary source is a first hand account of an event while a secondary source is a retelling or second hand account meaning as many details will be prevalent.