Question

Prob. 2.3-3. 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

Answer 1

Answer:

$8.3 *10^{-3}$

Explanation:

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strain is defined as = extension/  original length

extension  = 50mm =m

original length = 6m

so,

strain = $50 *10^{-3}$/6

= $8.3 *10^{-3}$

strain is a dimensionless unit