An elastic spring of unstretched length L and spring constant K is stretched by a small length x. It is further stretched by another small length y. the work done in second stretcing is

An elastic string of unstretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in second stretching is

An elastic spring of unstretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. Work done during the second stretching is

An elastic spring of unstretched length L and force constant K is stretched by amoun t x .It is further stretched by another length y The work done in the second streaching is

An elastic spring of length L and spring constant K is stretched by a length x. It is then again stretched to a length y. The work done in the second case will be