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Physics HL

Chapter 3: Work, Energy and Power

Develop the language of energy transfer, move from force-based work to conservation reasoning, and quantify power and efficiency in realistic systems.

Estimated chapter time: 140 minutes

Chapter Topics

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  1. 11. Chapter Orientation
    1. 1.11.1 From force stories to energy stories
    2. 1.21.2 Sign convention still matters
  2. 22. Work as Energy Transfer
    1. 2.12.1 Constant force component
    2. 2.22.2 Area under F-x
    3. 2.32.3 Centripetal force and zero work
  3. 33. Net Work and Kinetic Energy
    1. 3.13.1 Work-kinetic energy relation
    2. 3.23.2 Work by gravity and path
    3. 3.33.3 Net work vs external work
  4. 44. Potential Energy Models
    1. 4.14.1 Gravitational potential
    2. 4.24.2 Elastic potential
    3. 4.34.3 Choosing reference level
  5. 55. Conservation and Dissipation
    1. 5.15.1 Mechanical conservation
    2. 5.25.2 Frictional transfer
    3. 5.35.3 Simulation sequence
    4. 5.45.4 Simulation interpretation
  6. 66. Power, Efficiency and Sankey
    1. 6.16.1 Power as rate
    2. 6.26.2 Efficiency
    3. 6.36.3 Sankey-style accounting

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2.5 Circular Motion and Centripetal Force

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How to Think Through Work and Energy