Case study·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
A motor changes its speed uniformly from to in . Use .
Total: 5 marks
(a) Convert the initial angular speed to rad/s. (1 mark)
(b) Convert the final angular speed to rad/s. (1 mark)
(c) Find the angular acceleration. (1 mark)
(d) Find the angular displacement in . (1 mark)
(e) Find the number of revolutions made in this time. (1 mark)
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