Question
Figure shows two cases. In first case a spring (spring constant $K$ ) is pulled by two equal and opposite forces $F$ at both ends and in second case is pulled by a force $F$ at one end. Extensions $(x)$ in the springs will be
✓
Answer
(b)
Figure $(2)$ is $F.B.D.$ of figure $(1)$ at equilibrium $F=K x$
$x=F / K$
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