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IB Physics HL A.5.4 Galilean velocity addition Question Bank

Practise IB Physics HL A.5.4 by applying galilean velocity addition concepts to exam-style physics questions.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, forces or energy relationships

A.5.4 (HL)—Galilean velocity addition question 1

[Maximum number: 2]

Two rockets, A and B , are moving towards each other on the same path. From the frame of reference of the Earth, an observer measures the speed of A to be 0.6 c and the speed of B to be 0.4 c. According to the observer on Earth, the distance between A and B is 6.0×108 m6.0 \times 10^{8} \mathrm{~m}.

Figure for Question A.5.4 (HL)—Galilean velocity addition question 1 — IB Physics HL

Calculate, according to the observer on Earth, the time taken for A and B to meet.

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