how is the original length when finding the YM of a copper wire? see diagram

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sarah99630
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http://pmt.physicsandmathstutor.com/...0Materials.pdf

the diagram on question 10...where do I label length?question 10(ii) Help please,and thanks a lot TSR people.
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Physics Enemy
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(Original post by sarah99630)
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Only section of the wire changing in measured length, is between point of attachment with copper and point horiz aligned with pulley's centre. In other words, the vertical section of the wire, so label that as L.
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sarah99630
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(Original post by Physics Enemy)
Only section of the wire changing in measured length, is between point of attachment with copper and point horiz aligned with pulley's centre. In other words, the vertical section of the wire, so label that as L.
alright got it,thanks a lot!!
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