ForcesIntroduction

The Hidden Danger of Speed

Part of Stopping Distances · GCSE GCSE Physics revision

This introduction covers The Hidden Danger of Speed within Stopping Distances for GCSE Physics. Revise Stopping Distances in Forces for GCSE Physics with 15 exam-style questions and 5 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 12 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 1 of 12

Practice

15 questions

Recall

5 flashcards

📖 The Hidden Danger of Speed

At 30 mph, a car needs about 23 metres to stop. At 60 mph — just double the speed — it needs about 73 metres! That's more than THREE times the distance. Why? Because thinking distance doubles (you travel twice as far during reaction time), AND braking distance QUADRUPLES (kinetic energy is proportional to v²). This is why speed limits exist near schools — the physics of stopping makes high speeds deadly.

Keep building this topic

Read this section alongside the surrounding pages in Stopping Distances. That gives you the full topic sequence instead of a single isolated revision point.

Stopping Distance = Thinking + Braking Factors Affecting THINKING Distance Factors Affecting BRAKING Distance

Practice Questions for Stopping Distances

What is the correct definition of stopping distance?

A. The distance the car travels while the brakes are applied only
B. The distance the car travels during the driver's reaction time only
C. Thinking distance plus braking distance
D. The speed of the car divided by the braking force

1 markfoundation

Explain why a car travelling at higher speed has a greater braking distance than a car travelling at lower speed, assuming the same braking force.

3 marksstandard

Quick Recall Flashcards

🧠 Factors Affecting THINKING Distance

Tiredness — slower brain processing

🧠 Factors Affecting THINKING Distance

Alcohol — impairs judgment and reactions

15 questions on Stopping Distances — practise free

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Stopping Distances

Stopping Distance = Thinking + Braking