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A wire fixed at the upper end stretches by length l by applying a force F. The work done in stretching is

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A wire fixed at the upper end stretches by length l by applying a force F. The work done in stretching is
A. (a) 2Fl
B. (b) Fl
C. (c) `(F)/(2l)`
D. (d) `(Fl)/(2)`
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Correct Answer - D
Work done by constant force in displacing the object by a distance l.
`=1/2xxFo rcexxextension=(Fl)/(2)`
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