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mention the expression for potential energy of string |
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Answer» Hooke's Law, F = -kx, where F is the force and x is the elongation. The work done = energy stored in stretched string = F.dx The energy stored can be found from integrating by substituting for force, and we find, The energy stored = kx²/2, where x is the final elongation. The energy density = energy/volume = (kx²/2)/(AL) =1/2(kx/A)(x/L) = 1/2(F/A)(x/L) = 1/2(stress)(strain) Like my answer if you find it useful! |
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