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)/(2)k(X^(2)+y^(2))` `(1)/(2)k(x+y)^(2)` `(1)/(2)k(y^(2)-x^(2))` `(1)/(2)ky (2x+y)` Answer :D