A-LevelPhysicsWaves9702/12 · May/June 2024 · Q211 Mark
A man stands stationary in front of a swing. A child sits and swings. [Figure 21.1] The child blows a whistle that emits a sound at a constant frequency. The man observes the frequency of the sound when the swing is at positions X, Y and Z. When will the man hear the highest frequency?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Awhen the swing is at X
Bwhen the swing is at Y and moving away from the man
Cwhen the swing is at Y and moving towards the man
Dwhen the swing is at Z
✓ Correct answer
C: when the swing is at Y and moving towards the man
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