A-LevelPhysicsPhysical quantities and unitsOct/Nov 2012Paper 1 Q71 Mark
The speed of a car is calculated from measurements of the distance travelled and the time taken. The distance is measured as 200m, with an uncertainty of ±2m. The time is measured as 10.0s, with an uncertainty of ±0.2s. What is the percentage uncertainty in the calculated speed?
A±0.5%
B±1%
C±2%
D±3%
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of physical quantities and units within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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