Unit 2 · Force and Translational Dynamics

Chapter 2.5

Friction and Spring Forces

Static friction grows to match whatever tries to slide the box — until it can't. A spring is the opposite kind of honest: its force is fixed by how far you stretched it.

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By the end

  1. 01Apply the kinetic friction model, including its direction and its independence from contact area
  2. 02Treat static friction as an adjustable force with a maximum, and find where sliding begins
  3. 03Apply Hooke's law for an ideal spring

In unit 2

  1. 2.1Systems, the Center of Mass, and Free-Body Diagrams
  2. 2.2Newton's Third Law, Tension, and Equilibrium
  3. 2.3Newton's Second Law and Connected Systems
  4. 2.4Gravitation, Weight, and Apparent Weight
  5. 2.5Friction and Spring Forces
  6. 2.6Circular Motion and Circular Orbits
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