Simple Harmonic Motion

It helps to understand how to get the differential equation for simple harmonic motion by linking the vertical position of the moving object to a point A on a circle of radius r. Computing the second-order derivative of y in  the equation y=r sin( ω t) gives the equation of motion (Overscript[y,  ..])=-(ω^2)y.

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Contributed by: Paul Rosemond (Cegep de l'Outaouais, Gatineau, Quebec)

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