09-S2-Q11 Read more about 09-S2-Q11 Train engine and trucks, inequality, approximation. [STEP II 2009 Question 11 (Pure)]
04-S2-Q11 Read more about 04-S2-Q11 Train and engines, velocities, conservation of energy. [STEP II 2004 Question 11 (Mechanics)]
93-S1-Q13 Read more about 93-S1-Q13 Train, tractive force, engine, time-distance. [STEP I 1993 Question 13 (Mechanics)]
