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
Two objects of masses and are released near the surface of the same planet where air resistance is negligible.
Total: 4 marks
(a) Write the gravitational force on an object of mass near the planet's surface. (1 mark)
(b) Use to find the acceleration. (1 mark)
(c) Compare the accelerations of the and objects. (1 mark)
(d) Name the assumption needed for this comparison. (1 mark)
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