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Unit 4

# 4.0 Unit 4 Overview: Energy

1 min readβ’june 8, 2020

Peter Apps

### AP Physics 1Β π‘

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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 itβ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?

Image courtesy of Giphy.

### Key Concepts π

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

### Key Equations π

π₯Watch: AP Physics 1 - Unit 4 Streams

## Resources:

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