2023 · Specimen · 0625/03 | Q7

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Question (7 of 12)6 marks · Practise this topic →

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Available practice: 75 of 80 marks. Parts 8(b), 10(d) await marking support. Scores cover available parts only.

Fig. 7.1 shows a floating plastic ball attached by a long rope to a weight on the bottom of a lake. A water wave on the surface of the lake causes the ball to move vertically up and down.

(a)On Fig. 7.1, show the wavelength of the wave. Label the distance W.

Fig. 7.1 — see the question text for what it shows

Answer guidance

Draw Accuracy is being marked. Use the figure and be precise about position and labels.

[1 mark]

Fig. 7.1 shows a floating plastic ball on a water wave on a lake; a vertical arrow marked 24 cm shows the distance from a wave crest down to the undisturbed (mean) level shown by a dashed line.

(b)Determine the amplitude of the wave, in cm.

Answer guidance

Determine Work it out from what you are given or from the figure, and show how you got there.

[1 mark]

A water wave on the surface of a lake causes a floating ball to move vertically up and down. The ball reaches its maximum height 40 times in 60 seconds.

(c)Calculate the frequency of the wave, in Hz.

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[2 marks]

A water wave travelling horizontally across the surface of a lake causes a floating ball to move vertically up and down.

(d)Explain how the motion of the ball shows that the water wave is transverse.

Answer guidance

Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.

[1 mark]

(e)State another example of a transverse wave (other than a water wave).

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

0625/03/SP/23Cambridge IGCSE Physics 0625 · Specimen 2023 · Paper 3 · Question 7