A-LevelPhysicsKinematicsFeb/Mar 2022Paper 1 Q61 Mark
A sprinter takes a time of 11.0s to run a 100m race. She first accelerates uniformly from rest, reaching a speed of 10ms⁻¹. She then runs at a constant speed of 10 ms⁻¹ until the finish line. What is the uniform acceleration of the sprinter for the first part of the race?
A0.5 ms⁻²
B0.91 ms⁻²
C1.7 ms⁻²
D5.0 ms⁻²
✓ Correct Answer
The correct answer is D: 5.0 ms⁻²
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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