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A wire is used to hang a lantern over a pool.Neglect the weight of the wire, and assume that it is taut, but strain free,

A wire is used to hang a lantern over a pool.Neglect the weight of the wire, and assume that it is taut, but strain free, before the lantern is hung. When the lantern is hung, it causes a 50-mm sag in the wire. Determine the extensional strain in the wire with the lantern hanging as shown.

-2 m Pool 4 m 50 mm P2.3-3

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