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Unit 4

4.0 Unit 4 Overview: Energy

1 min readβ€’june 8, 2020

peter57616

Peter Apps


AP Physics 1 🎑

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Unit 4 introduces the concept of energy as an alternative method of solving some of the problems encountered in Units 1-3. The skills learned in this unit will become essential tools in dealing with some of the more advanced concepts in the later units. These topics will account for up to a quarter (~16-24%) of the AP exam questions and will take approximately 19-22 45 minute class periods to cover. This is a foundational unit to the course, and it’s vital you can understand and apply the concepts.

Applicable Big Ideas

  • Big Idea #3: Force Interactions - How does pushing something give it energy?
  • Big Idea #4: Change - How is energy exchanged and transformed within or between systems? How does the choice of system influence how energy is stored or how work is done?
  • Big Idea #5: Conservation - How is energy transferred between objects or systems? How does the law of conservation of energy govern the interactions between objects and systems?
https://firebasestorage.googleapis.com/v0/b/fiveable-92889.appspot.com/o/images%2Fconservation.gif?alt=media&token=67700e29-f66d-4eea-b9ce-617f5b244947

Image courtesy of Giphy.

Key Concepts πŸ”‘

  • Systems
  • Work (W)
  • Power (P)
  • Gravitational Potential Energy (Ug)
  • Elastic Potential Energy (Usp)
  • Kinetic Energy (K)
  • Conservation of Energy

Key Equations πŸ—

https://firebasestorage.googleapis.com/v0/b/fiveable-92889.appspot.com/o/images%2FScreen%20Shot%202020-04-13%20at%2012.47.45%20PM.png?alt=media&token=3e7d196c-91e7-46f7-b3ae-a9d2ec45efa2
πŸŽ₯Watch: AP Physics 1 - Unit 4 Streams

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