e/Pendulum (derivations)

Information
has gloss	eng: To begin, we shall make three assumptions about the simple pendulum: * The rod/string/cable on which the bob is swinging is massless, does not stretch, and always remains taut. * The bob is a point mass. * Motion occurs in a 2-dimensional plane, i.e. pendulum does not swing into and out of the page.
lexicalization	eng: pendulum
instance of	(noun) an apparatus consisting of an object mounted so that it swings freely under the influence of gravity pendulum

Media
media:img	Pendulum.png
media:img	Simple pendulum height.png