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 stone tied to a string moves uniformly in a horizontal circle of radius and completes one revolution in .
Total: 5 marks
(a) Find the frequency. (1 mark)
(b) Find the angular speed. (1 mark)
(c) Find the linear speed. (1 mark)
(d) Find the centripetal acceleration and state its direction. (2 marks)
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