A high-speed passenger train has a total mass of 640 000 kg640\,000\text{ kg}640000 kg. The train is travelling at a speed of 75 m/s75\text{ m/s}75 m/s. The driver applies the brakes, and the train takes 50 s50\text{ s}50 s to slow down to a speed of 35 m/s35\text{ m/s}35 m/s.
Calculate the impulse applied to the train as it slows down.
Calculate the average resultant force applied to the train as it slows down.
Suggest how the streamlined aerodynamic shape of the train helps it to travel at high speeds.
The train took 50 s50\text{ s}50 s to reduce its speed from 75 m/s75\text{ m/s}75 m/s to 35 m/s35\text{ m/s}35 m/s. Explain why, with the same braking force from the mechanical brakes, the train takes more than 50 s50\text{ s}50 s to reduce its speed from 35 m/s35\text{ m/s}35 m/s to zero.
On a wet day with water on the tracks, the train travels a greater distance before it stops. Suggest a reason for this.
78 exam-style questions on CIE IGCSE Physics Momentum, covering Momentum. Each one has a worked solution and a mark scheme showing where the marks go.