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Physics

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Simple Harmonic Motion

 

11-17-99

Sections 10.1 - 10.4

The connection between uniform circular motion and SHM

It might seem like we've started a topic that is completely unrelated to what we've done previously; however, there is a close connection between circular motion and simple harmonic motion. Consider an object experiencing uniform circular motion, such as a mass sitting on the edge of a rotating turntable. This is two-dimensional motion, and the x and y position of the object at any time can be found by applying the equations: 

Pressure and buoyancy

 

11-12-99

Sections 10.1 - 10.6

What is a fluid?

You probably think of a fluid as a liquid, but a fluid is simply anything that can flow. This includes liquids, but gases are fluids too.
Mass density

When we talk about density it's usually mass density we're referring to. The mass density of an object is simply its mass divided by its volume. The symbol for density is the Greek letter rho, r :

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