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IB Physics HL A 4 3 Hl Unbalanced Torque Questions

Use unbalanced torque to explain angular acceleration, frictional moments and why changing torque prevents constant-angular-acceleration equations.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Determine the resultant torque and angular acceleration when torques are unbalanced.
  • Relate net torque, moment of inertia and rotational motion using complete diagrams and mark-scheme evidence.

IB Physics HL A 4 3 Hl Unbalanced Torque Questions 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 IB Physics HL A 4 3 Hl Unbalanced Torque Questions 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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