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
Two carts collide at right angles on a smooth floor and stick together. Cart A of mass moves east at ; cart B of mass moves north at .
Total: 5 marks
(a) Find the total eastward momentum before collision. (1 mark)
(b) Find the total northward momentum before collision. (1 mark)
(c) Find the east and north components of the common final velocity. (2 marks)
(d) Find the magnitude of the common final velocity. (1 mark)
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