Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A pulse travels along a string and covers in . Later, a continuous sinusoidal wave is sent along the same string with frequency under the same tension.
Total: 4 marks
(a) Find the wave speed on the string. (1 mark)
(b) Find the wavelength of the sinusoidal wave. (1 mark)
(c) If the frequency is doubled under the same conditions, what happens to wave speed? (1 mark)
(d) For doubled frequency, what is the new wavelength? (1 mark)
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