1. The problem statement, all variables and given/known data Damping is negligible for a 0.145 kg object hanging from a light 6.30 N/m spring. A sinusoidal force with an amplitude of 1.70 N drives the system. At what frequency will the force make the object vibrate with an amplitude of 0.440 m? 2. Relevant equations I don't know how to put formulas in here but basically find out the initial omega value, then plug it into the forced oscillations amplitude equation to get the angular frequency. Then use the frequency formula to get your frequency. 3. The attempt at a solution Here's the problem!! The question asks me for 2 solutions -- higher frequency and lower frequency. I obtained the higher frequency given the equations above and it is indeed the correct answer. That answer is 1.33 Hz. Now how do I get the lower frequency? It's not -1.33 if anyone is wondering. Thanks for the help guys!