Question regarding Elastic Potential Energy

AI Thread Summary
A particle attached to an elastic string is projected downward from a ceiling point, and it comes to rest after moving a distance of 10l/3. The discussion clarifies that this distance does include the natural length of the string. The initial confusion about whether the natural length is part of the distance moved is resolved. Participants confirm that the distance calculation accounts for the string's rest length. The explanation helps to understand the problem more clearly.
garyljc
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Hey guys ,
I got another question , here goes :

A particle P of mass m is attached to one end of a light elastic string of natural length l whose 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 :biggrin: ... Geeez ... thanks :shy:
 
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hmmm ... no one ? I just need to know does the distance includes the natural length =) Can anyone tell me please ?
 
garyljc said:
Hey guys ,
I got another question , here goes :

A particle P of mass m is attached to one end of a light elastic string of natural length l whose 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 :biggrin: ... Geeez ... thanks :shy:
The question says that it is projected vertically from A which is the point where the string is attached. So the distance includes the length at rest of the string.
 
ahhh , got it ... I'm confuse before that lol . thanks = )
 
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