New ReviewIn this lesson, we compare electric potential energy and gravitational potential energy for a proton moving between parallel plates in a uniform electric field, and we plug in realistic values to show just how small the gravitational...

New ReviewLearn how fluid speed changes in a narrowing pipe using laminar flow, the continuity equation, and a clear animation. Perfect for physics students!

New ReviewThis lesson explains the difference between the ideal electric field assumed in most physics problems and the real, nonideal electric field that forms between two finite, conducting parallel plates. Using clear illustrations, I break...

New ReviewFriction always acts to oppose sliding motion, even when it makes an object speed up. Learn how this works with a clear and simple example using a sliding disk and a moving block.

New ReviewIn this video, we build directly on electric potential energy and electric potential to develop a clear, conceptual understanding of electric potential difference. Using parallel plates and a uniform electric field, you will see where...

New ReviewIn this lesson we derive the change in gravitational potential energy for an object moving in a uniform gravitational field and then use that result as a direct analogy to determine the change in electric potential energy for a charge...

New ReviewNewton’s Third Law forces are always equal and opposite, but they act on different objects. Learn how to identify these force pairs and draw the correct free-body diagrams.

New ReviewIn this lesson, we explore the electric potential difference between two locations in the electric field of a point charge — one of the most essential concepts in AP Physics and introductory electrostatics. Using a positive point charge...

New ReviewLearn Bernoulli’s Principle with a straw and a ping pong ball. A fun and simple physics demo to see pressure differences in action!

New ReviewA beach ball floating in mid-air, held up by nothing but a leaf blower. It looks like a magic trick — but it's actually Bernoulli's Principle at work. Faster-moving air has lower pressure, so the airstream creates a pressure difference...

New ReviewIn this Flipping Physics video, I share a simple teaching habit that helped me continually improve my physics assignments over nearly 25 years in the classroom. By updating labs and worksheets immediately after grading them, I kept track...

In this lesson we explore why the electric field between two ideal parallel plates is uniform and always directed from the positive plate to the negative plate. Using Coulomb’s law, symmetry arguments, and clear step by step reasoning,...

In this video, I walk you through my general suggestions for how to solve physics problems — the same step-by-step process I teach my students to help them succeed in AP Physics and beyond. We cover everything from setting up your...

Electric potential can feel abstract, but it doesn’t have to be! In this Flipping Physics lesson, Mr. P and the gang use gravitational potential energy to make sense of electric potential and electric potential energy. You’ll see how...

In this video, we explore equipotential surfaces and how they connect to electric potential and electric field lines. Using clear visuals and step-by-step reasoning, Mr. P helps you see how electric field lines are always perpendicular...

Did you know the center of mass can be outside the object itself? Learn what center of mass really means and see clear examples with everyday objects like bananas, donuts, and golf clubs.

Can you blow a ping pong ball out of a funnel? Learn how Bernoulli’s Principle explains why you can't—demonstrated clearly and simply by Mr. P from Flipping Physics.

After 25 years of teaching physics, I realized I had been wrong about when you can use the equation Work due to nonconservative forces = Change in mechanical energy. In this video, I break down my mistake, show the correct way to think...

Even after more than 25 years of teaching physics, I’m still learning new things—and sometimes realizing I was wrong. In this video, I talk about how I misunderstood a concept related to the work due to nonconservative forces and what...

A moving object doesn’t always have a force in the same direction as its motion. Learn why with this simple hockey puck example and deepen your understanding of Newton’s laws.

Learn the physics behind ideal fluid flow and the continuity equation—complete with animation, explanation, and a real-life garden hose example.

Discover how buoyancy and tension interact in this physics experiment! Learn why a wood sphere attached to a beaker changes the scale reading, even though it’s submerged like a steel sphere. Perfect for students exploring forces,...

Learn about buoyancy and pressure in this physics experiment! See why the scale reading stays the same, even with a steel sphere submerged. Perfect for students curious about forces, pressure, and fluid dynamics.<b<br/>r/>

Explore buoyant force in this physics experiment! See why the scale reading matches the buoyant force whether a sphere or equivalent water volume is in a beaker. Perfect for students learning about forces, buoyancy, and fluid displacement.