1. The problem statement, all variables and given/known data What is the difference between "the work required to stretch a spring" and "the work done by a spring"? 2. Relevant equations Fdx = dW F (from the spring)= -kx so, F (from me) = kx 3. The attempt at a solution I have tried and I found out the work required to stretch a spring x1 to x2 is(1/2)k(x2^2 - x1^1) and "the work dont by a spring" when it's released from x1 to x2 is the same thing but in opposite sign Am I right?