1. The problem statement, all variables and given/known data A person does .02 Joules of work winding a watch. Assuming NO loss of energy to friction, how much energy is stored in the watch's main spring? 2. Relevant equations PE=1/2kx^2 ?? I have no idea.. 3. The attempt at a solution I've gotten nowhere trying to do this problem without other information, such as mass or length. Thank you for looking and helping!