IGCSE · 1 · multiple choice
Motion, forces and energy · Question 2
Motion, forces and energy · Original GioPhysics question with a detailed, mark-by-mark answer guide.
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multiple choice1 mark
A cyclist travels 100 m in a straight line in 20 s, then stops at traffic lights for 10 s. What is the average speed over the whole 30 s?
- A
0 m/s
- B
3.3 m/s
- C
5.0 m/s
- D
10 m/s
Ready to self-mark?Reveal the detailed answer guide
Answer overviewCorrect answer: B — 3.3 m/s
01
1 markAnswer and reasoning
How to approach it
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
The correct choice is B: 3.3 m/s
- 2
C is the speed while moving — the commonest wrong answer, because it ignores that average speed is total distance over total time. D halves the time as well as reading only the first stage.
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