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I got another question , here goes :

A particle P of mass m is attached to one end of a light elastic string of natural lengthlwhose other end is atached to a point A on a ceiling. When P hangs in equilibrium AP has legth 5/3l. Show that if P is projected vertically downwards from A with speed *squareroot*3gl/2 , P will first come to instantaneous rest after moving a distance of 10l/3 .

What confuses me , is the distance moved . Does it include the natural length or not ? Please show me the proof ... Geeez ... thanks :shy:

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# Homework Help: Question regarding Elastic Potential Energy

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