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Unit 5: Torque and Rotational Dynamics

Rotational Inertia

Calculate rotational inertia from I = Σmr² and I = ∫r² dm, derive it for rods, hoops and disks, and move between axes with the parallel axis theorem.

Topic 5.4 · 12 min read

This lesson comes with the AP Physics C: Mechanics plan

In this lesson

  1. 01Why mass far from the axis counts more
  2. 02From a sum to an integral
  3. 03The parallel axis theorem
  4. 04Worked examples
  5. 05Where students lose points

The first units’ lessons are free. The plan opens every lesson, every practice question with worked solutions, your study plan and calendar, for $14.49 a month. Cancel any time.

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