A-LevelPhysicsGravitational fieldsOct/Nov 2017Paper 4 Q110 Marks
Answer all the questions in the spaces provided. (b) The planet Jupiter and one of its moons, Io, may be considered to be uniform spheres that are isolated in space. Jupiter has radius R and mean density ρ. Io has mass m and is in a circular orbit about Jupiter with radius nR, as illustrated in Fig. 1.1. [Figure 1.1] The time for Io to complete one orbit of Jupiter is T. (c) (i) The radius R of Jupiter is 7.15×10⁴km and the distance between the centres of Jupiter and Io is 4.32 × 10⁵ km. The period T of the orbit of Io is 42.5 hours.
📋 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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