ConceptConceptDocsDocuments

IB Physics HL A.4.9 Angular momentum Question Bank

Practise IB Physics HL A.4.9 by applying angular momentum 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.4.9 (HL)—Angular momentum question 1

[Maximum number: 1]

A horizontal rigid bar of length 2 R is pivoted at its centre. The bar is free to rotate in a horizontal plane about a vertical axis through the pivot. A point particle of mass M is attached to one end of the bar and a container is attached to the other end of the bar.

A point particle of mass M3\frac{M}{3} moving with speed v at right angles to the rod collides with the container and gets stuck in the container. The system then starts to rotate about the vertical axis.

The mass of the rod and the container can be neglected.

Figure for Question A.4.9 (HL)—Angular momentum question 1 — IB Physics HL

Write down an expression, in terms of M, v and R, for the angular momentum of the system about the vertical axis just before the collision.

All question bank results loaded