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IB Physics HL A.4.3 Unbalanced torque Question Bank

Practise IB Physics HL A.4.3 by applying unbalanced torque 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.4.3 (HL)—Unbalanced torque question 1

[Maximum number: 2]

A boat is moved from land to water by rolling it across a set of cylindrical airbags.

Figure for Question A.4.3 (HL)—Unbalanced torque question 1 — IB Physics HL

Another way to move a boat down a ramp is to place it on rigid rods. Assume that the same boat is now moved on rods of diameter 1.80 m with the same boat acceleration as before.

Outline how two frictional forces lead to the angular acceleration of the rod.

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