1. The problem statement, all variables and given/known data As stated in the title, I'm having trouble integrating ma+kx=0 to get x(t) 2. Relevant equations 3. The attempt at a solution So I know I have to integrate twice but I'm not getting the answer required. ∫a = -k/m∫x v = (-k/m)[(x²/2) + C] ∫v = (-k/2m)∫x² + (-kC/m) x = (-k/2m)x³/3 + (-kC/m) This is clearly wrong because I have no time variables. Any help would be much appreciated.