A wire fixed at the upper end stretches by length by applying a force F.The work done in stretching is
A wire fixed at the upper end stretches by length by applying a force F.The work done in stretching is
(a) F/2l
(b) Fl
(c) 2Fl
(d) Fl/2
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Correct Option (d) Fl/2
Explanation:
As work done in stretching the wire = Potential energy stored
= 1/2 x Stress x Strain x Volume
= 1/2 x F/A x 1/L x AL = 1/2Fl
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