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8th Grade Science
Forces and Motion
12. Motion
12.2 Work and Power, Energy relationships
Work, Power, and Energy Relationships in Motion
Discover how forces transfer energy, how work and power are calculated, and how the work-energy theorem connects motion to energy in physical systems.
What You'll Learn
Work equals force times displacement, measured in joules always.
Power measures how quickly work is done over time taken.
Kinetic and potential energy transform according to conservation laws.
The work-energy theorem links net work to kinetic energy change.
What You'll Practice
1
Students calculate work using W equals force times distance formula.
2
Learners apply the power formula to compare machine energy output.
3
Practice questions test kinetic energy, potential energy, and conservation laws.
Why This Matters
Understanding work, power, and energy relationships equips students to analyze physical systems, solve real-world problems, and build the scientific foundation needed for advanced study in electricity, engineering, and environmental science.
This Unit Includes
Practice exercises
Learning resources
Skills
Work Formula
Power Output
Kinetic Energy
Energy Conservation
Work-Energy Theorem
MD Curriculum Aligned