Cambridge International AS & A Level Physics · A2 13 · structured
Circular orbit around a neutron-star model
Gravitational fields · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- discriminating
- Marks
- 5
- Topics
- 3
- Answer
- Complete
Question5 marks
A small satellite is in a circular orbit of radius 2 × 10⁴ m around a neutron-star model, whose mass is 2 × 10³⁰ kg. Calculate the orbital speed. Use G = 6.67 × 10⁻¹¹ N m²/kg².
Task interpretation
What a complete response should do
Build a visible chain from the information given to the quantity or statement requested.
Make assumptions explicit, connect several ideas, and test whether the final result is physically reasonable.
- Response type
- structured
- Allocation
- 5 marks
- Demand
- discriminating
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