4 – Forces & Dynamics

4.1 – Types of Force

4.1.1 – Gravitational Force (Weight)

4.1.2 – Friction

4.1.3 – Air Resistance

4.1.4 – Tension

4.1.5 – Normal Contact Force

4.1.6 – Thrust

4.1.7 – Lift

4.1.8 – Upthrust

4.2 – Free-body Diagram

4.2.1 – Challenging Free-Body Diagram Problems 

4.3 – Balanced & Unbalanced Forces

4.4 – Newton’s First Law

4.5 – Newton’s Second Law

4.5.1 – Terminal Velocity

4.6 – Newton’s Third Law

4.7 – Vector Addition

4.8 – Vector Resolution

4.9 – Circular Motion (Advanced Physics Topic)

4.10 – Gravitational Fields (Advanced Physics Topic)

4.11 – Linear Momentum (Advanced Physics Topic)

 

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Quotes by Physicists

"Things on a very small scale behave like nothing that you have any direct experience about. They do not behave like waves, they do not behave like particles, they do not behave like clouds, or billiard balls, or weights on springs, or like anything that you have ever seen."

Richard P. Feynman

2025 Physics Lessons