A train is travelling at a steady speed along a straight, horizontal track. Which statement about the train is correct?
The engine's forward driving force is greater than the resistive forces acting on the train.
The resultant force on the train is zero.
The resultant force on the train is in the forward direction of motion.
The upward vertical contact force from the track is greater than the weight of the train.
245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.