IB Physics · A.5 · free response
Moving-clock interval 6
Space, time and motion · Special relativity · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- discriminating
- Marks
- 6
- Topics
- 2
- Answer
- Complete
Question6 marks
A spacecraft moves at 0.66c relative to Earth. A process lasts 6.4 μs in the spacecraft frame. Determine the Lorentz factor and the duration measured on Earth.
Task interpretation
What a complete response should do
Develop a connected physics argument and support each claim with a relationship, calculation, or observation.
Make assumptions explicit, connect several ideas, and test whether the final result is physically reasonable.
- Response type
- free response
- Allocation
- 6 marks
- Demand
- discriminating
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