The ABCs of Physics

b=buoyancy is part of Ashley JM’s photo set The ABCs of Physics. In her words:

Buoyancy is what causes less dense objects to float in a more dense fluid, such as a helium balloon in air. There is a buoyant force that pushes up on the object, equal to the weight of the displaced fluid.

That little diagram up there is called a force diagram, they can be even more daunting than equations at times. This one shows that the buoyant force up on the balloon is equal to the force of tension in the string, this keeps the balloon in equilibrium.

Be sure to look at the rest of her physics photos! # (via physicsphysics)

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