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Grade: 12th pass
        
A wire fixed at the upper end stretches by length l by applying a force F. The work done in stretching is
(a) 2F l
(b) f l
(c) F/2 l
(d) F l/2
3 years ago

Answers : (1)

Aditi Chauhan
askIITians Faculty
396 Points
							

Sol. 2. (d). Work done by constant force in displacing the object by a distatance l

= 1/2 * stress * strain * volume

= 1/2 / F/A * l/L * A * L = Fl/2

3 years ago
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