PROPERTIES OF MATTER · Part 13

area of cross section is A. Let a force produce an extension l and further assume that the elastic limit of the wire has not been exceeded and there is no loss in energy. Then, the work done by the force F is equal to the energy gained by the wire. The work done in stretching the wire by d l , dW = F d l The total work done in stretching the wire from to l is W = Fdl l