JEE Main2004PhysicsWork, Power and EnergyActual
A wire fixed at the upper end stretches by length by applying a force F. The work done in stretching is
Options
- AF / 2
- BF
- C2 ~F
- DF / 2
Correct answer
D. F / 2
Step-by-step solution
Work done = 1 2 kx ^2= 1 2 k ^2 where is the total extensions. = 1 2 ( k ) = 1 2 ~F