A train can travel at a top speed of $200\,\text{km h}^{-1}$. From rest, it speeds up with a constant acceleration of $0.70\,\text{m s}^{-2}$.
(a(i))[1]
Define acceleration in terms of the change in velocity.
(a(ii))[2]
Show that the train’s maximum speed is about $56\,\text{m s}^{-1}$.
(a(iii))[2]
Calculate the time needed for the train to attain its maximum speed.
(b(i))[2]
Calculate the force responsible for the train’s acceleration.
(b(ii))[1]
State and explain what effect this force has on the train’s motion.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Change in velocity per unit time / rate of change of velocity / per second” …