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) Find the maximum available static friction. (1 mark)
(b) Find the radial force needed for circular motion at this instant. (1 mark)
(c) Find the tangential force needed to produce the given tangential acceleration. (1 mark)
(d) Find the resultant static friction required. (1 mark)
(e) Decide whether the car can move this way without skidding. (1 mark)