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## Author

Crash Course

9th, 10th, 11th, 12th, AP® / College

## Subjects

Science, Physics, Mathematics

Global

# Work, Energy, and Power

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Synopsis
• This video defines work, energy, and power and describes how these concepts are related.
• Students will learn about the equations for work, kinetic energy, gravitational potential energy, spring potential energy, and average power.
• The video also explains what a system is and compares non-conservative and conservative systems, specifically highlighting the example of a simple pendulum.
Teaching Tips

Positives

• The video animations demonstrate key concepts and display important equations and definitions.
• Students can see how mathematical concepts in trigonometry and calculus relate to physics and the real world.

• Students should already be familiar with forces including applied, gravitational, frictional, and spring forces.
• The last 30 seconds of the video are credits and sponsors.
• Many high school students will not be familiar with the calculus concept of integrals, which is mentioned in the video.

Differentiation

• This video can be used in math classes to apply vectors or trigonometry functions to real-world calculations.
• Understanding the basics of work, energy, and power is an important precursor to learning about energy sources, which is a key issue in climate change.
• Students can discuss Earth as a system and how climate change is impacting the energy flow in this system.
Scientist Notes

The video simplifies the concept of power, energy, and work and provides a basic illustration of how energy works in a system. There is a high confidence to use this resource for teaching.

Standards

This resource addresses the listed standards. To fully meet standards, search for more related resources.

• Mathematics
• Geometry: Similarity, Right Triangles, & Trigonometry (9-12)
• HSG.SRT.C.8 Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.
• HSG.SRT.D.11 Understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces).
• Number & Quantity: Vector & Matrix Quantities (9-12)
• HSN.VM.A.1 Recognize vector quantities as having both magnitude and direction. Represent vector quantities by directed line segments, and use appropriate symbols for vectors and their magnitudes (e.g., v, |v|, ||v||, v).
• HSN.VM.A.3 Solve problems involving velocity and other quantities that can be represented by vectors.
• Science
• PS3: Energy
• HS-PS3-1. Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.
• HS-PS3-2. Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as a combination of energy associated with the motion of particles (objects) and energy associated with the relative position of particles (objects).
• Related Resources