A-LevelPhysicsDynamicsMay/June 2021Paper 2 Q212 Marks
A person uses a trolley to move suitcases at an airport. The total mass of the trolley and suitcases is 72 kg. At another place in the airport, the trolley and suitcases are on a slope, as shown in Fig. 2.1. [Figure 2.1] The person releases the trolley from rest at point X. The trolley moves down the slope in a straight line towards point Y. The distance along the slope between points X and Y is 9.5m. The component F of the weight of the trolley and suitcases that acts along the slope is 54 N. Assume that a constant total resistive force of 18N opposes the motion of the trolley and suitcases.
📋 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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