The total mass of a high-speed train and its passengers is 640,000 kg640{,}000\text{ kg}640,000 kg. The train is travelling at a speed of 90 m/s90\text{ m/s}90 m/s. The driver applies the brakes and the train takes 50 s50\text{ s}50 s to slow down to a speed of 40 m/s40\text{ m/s}40 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 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 90 m/s90\text{ m/s}90 m/s to 40 m/s40\text{ m/s}40 m/s. Explain why, with the same braking force, the train takes more than 50 s50\text{ s}50 s to reduce its speed from 40 m/s40\text{ m/s}40 m/s to rest.
On a wet day, the train travels a greater distance before it stops along the same track. 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.