Unit 5 · Torque and Rotational Dynamics

Chapter 5.3

Rotational Equilibrium and Newton's Second Law for Rotation

A diving board holds perfectly still with a swimmer on its tip, and the anchor at its back end is pulling the board down, not up. Stillness takes two separate promises.

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By the end

  1. 01Solve rotational equilibrium problems — beams, ladders, hanging signs — about a well-chosen axis
  2. 02Explain how rotational and translational equilibrium can hold separately
  3. 03Apply the rotational second law, including a massive pulley coupled to a translating block

In unit 5

  1. 5.1Rotational Kinematics
  2. 5.2Torque and Rotational Inertia
  3. 5.3Rotational Equilibrium and Newton's Second Law for Rotation
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