Work-Energy Theorem
Also known as: work-kinetic energy theorem
The net work done on an object equals the change in its kinetic energy — the bridge between force and motion. Often much easier to solve motion problems using energy methods rather than tracking forces.
💡 Intuition
The total work done on an object is exactly what changes its kinetic energy.
Core Idea
This theorem bridges force-based thinking (work) with energy-based thinking (kinetic energy).
🔬 Example
🎯 Why It Matters
Often much easier to solve motion problems using energy methods rather than tracking forces.
⚠️ Common Confusion
Only net work changes KE—individual forces may do positive or negative work.
Related Concepts
Prerequisites
Next Steps
How Work-Energy Theorem Connects to Other Ideas
To understand work-energy theorem, you should first be comfortable with work and kinetic energy. Once you have a solid grasp of work-energy theorem, you can move on to power.
Go Deeper
Frequently Asked Questions
What is Work-Energy Theorem in Physics?
The net work done on an object equals the change in its kinetic energy — the bridge between force and motion.
Why is Work-Energy Theorem important?
Often much easier to solve motion problems using energy methods rather than tracking forces.
What do students usually get wrong about Work-Energy Theorem?
Only net work changes KE—individual forces may do positive or negative work.
What should I learn before Work-Energy Theorem?
Before studying Work-Energy Theorem, you should understand: work, kinetic energy.
🧪 Visualization Static
Visual demonstration of this concept.