Long answer·Hard exam skill (4/5)·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
Explain how the simple pendulum practical verifies conservation of mechanical energy qualitatively.
Total: 5 marks
(a) State where potential energy is maximum and where kinetic energy is maximum. (2 marks)
(b) Explain the energy conversion during motion. (2 marks)
(c) State one reason why the pendulum eventually slows down in a real setup. (1 mark)
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