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IB Physics: Mechanics

The Physics Classroom


Archimedes' principle indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.

The real story behind Archimedes’ Eureka!

When you think of Archimedes’ Eureka moment, you probably imagine a man in a bathtub, right? As it turns out, there's much more to the story. Armand D'Angour tells the story of Archimedes' biggest assignment -- an enormous floating palace commissioned by a king -- that helped him find Eureka.

Human Loop the Loop with Damien Walters - Pepsi Max

Describing Movement

Motion in a Straight Line: Crash Course Physics #1

In this, THE FIRST EPISODE of Crash Course Physics, your host Dr. Shini Somara introduces us to the ideas of motion in a straight line. She talks about displacement, acceleration, time, velocity, and the definition of acceleration. 

Moving About

Fluid Mechanics

Prize-Winning Videos Capture the Strange Beauty of Fluids in Motion

This set of videos shows the impact of water drops on the surface of granular particles—a phenomenon that is likely familiar to all of us who have watched raindrops splashing in a backyard or on a beach. The high-speed photography reveals the detailed liquid-drop impact dynamics at various impact velocities.

A winner of the Gallery of Fluid Motion, this high-speed video shows the impact of a water drop landing on sand. Full video. Xiang Cheng, et al

Beautiful Photos Show the Bizarre Behavior of Liquids

Liquids come in many forms, from bubbles and droplets to jets and sheets. Henri Lhuissier of Paris Diderot University and his colleagues use high-speed cameras to zoom in on the physics behind all kinds of liquid phenomena.



Fluids at Rest: Crash Course Physics #14

In this episode of Crash Course Physics, Shini is very excited to start talking about Fluids. You see, she's a Fluid Dynamicist and Mechanical Engineer, so fluids are really important to her. Actually they're really important to anyone studying physics. So, let's start down this path of understanding, not only how fluids work, but what they are!