The work done by the external ajent in stretching a spring of force constant `k` from length `l_(1)`to `l_(2)` is

The work done by the external agent in stretching a spring of force constant k from length l_(1) to l_(2) is

K is the force constant of a spring. The work done is increasing its extension from l_(1) to l_(2) will be

K is the force constant of a spring. The work donein increasing its extension from l_(1) to l_(2) will be

k is the force constant of a spring. The work done in increasing its extension from l_(1) to l_(2) will be:

k is the force constant of a spring. The work done in increasing its extension from l_(1) to l_(2) will be:

For a constant force the work done in stretching if spring constant k_(1)gtk_(2) then energy stored in two wire related as

An elastic spring of length L and of force constant k is stretched to increase its length by an amount x. The spring is further stretched to elongate it by y. The amount of work done in stretching the spring in the second case ( x and y are very small) is