I'm a little stuck on this:
Suppose that the acceleration of a train during the interval of time from t=2 s to t=4 s is a=2t m/s^2, and at t=2 s its velocity is 180km/h
Using formulas: Velocity v=ds/dt and acceleration a =dv/dt, determine:
(a) the train’s velocity at t=4 s,
and...