A spring of force constant .k. is stretched by a small length .x.. The work done in stretching it further by a small length .y. is

A spring of force constant .k. is stretched by a small length .x.. The

1.	A spring of force constant .k. is stretched by a small length .x.. The work done in stretching it further by a small length .y. is
Answer» `1/2k(X^(2) + y^(2))` `1/2k(x+y)^(2)` `1/2k(y^(2)-x^(2))` `1/2ky(2X + y)` ANSWER :D