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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 trolley experiment gives the following acceleration readings for the same trolley: pulling force 0.5,1.0,1.5 N0.5,1.0,1.5\,\text{N} gives acceleration 0.20,0.40,0.61 m/s20.20,0.40,0.61\,\text{m/s}^2.
Total: 4 marks

(a) Describe the relationship suggested by the data. (2 marks)

(b) Identify one reading that may contain small experimental error. (1 mark)

(c) Suggest one improvement to the experiment. (1 mark)

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cbse-science-9.ia.tia-5.case.003

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