The spring is now compressed so that unconstrained end moves from x = 0 to x = L.
Using the work integral W = ∫ x f(xᵢ) F(x)⋅dx, find the work done by the spring as it is compressed. Express the work done by the spring in terms of k and L.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

answer///scientific method;