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In-depth articles on physics fundamentals written by physicists and educators. Clear explanations, real-world examples, and the conceptual depth you won't find in a typical textbook.
Every object you have ever seen — every car on the highway, every satellite in orbit, every atom vibrating in your coffee cup — follows the same three rules. These are Newton's laws of motion,...
Read article →When you pluck a guitar string, watch ripples cross a pond, or see light travel from the Sun to your eyes, you're witnessing transverse waves in action. Transverse waves are one of the two fund...
Read article →Ask a physicist "what is energy?" and you'll often get a pause. Not because the question is trivial — quite the opposite. Energy is arguably the single most important concept in all of physics,...
Read article →If you could only keep one equation from all of physics, it should be this one: F = ma. Newton's second law of motion is the most powerful and widely applied equation in classical physics. It c...
Read article →A basketball arcing toward the hoop, a cannonball launched from a fortress, a stream of water from a garden hose — all are examples of projectile motion. It's one of the first topics you encoun...
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