IB skill practice

Use relativistic velocity and energy relationships

Official-syllabus Physics skill catalogue entry. Seeded skills are activated only after exam-style question templates pass validation.

Paper 1, Paper 2 5 marks Difficulty 4

Relativistic velocity addition same direction

In a medical linac calibration, a particle moves at \(0.37c\) inside a spacecraft moving at \(0.385c\) in the same direction. Calculate the particle speed in the lab frame as a fraction of \(c\). Enter the numerical result and choose the interpretation that matches the physics meaning.

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