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REVIANNA
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Homework Statement
A copper rod of length l_0 at 0 C is placed on a smooth surface.Now the rod is heated up to 100 C.FIND THE LONGITUDINAL STRAIN DEVELOPED ?
The Attempt at a Solution
What I did :
strain = delta l/ l_0
= l_0 alpha(coefficient of linear expansion) delta T/l_0
=100 alpha
but surprisingly the answer is zero and the solution says since the "SURFACE IS SMOOTH".
I have no clue why or how it works?