View Thumbnail. The setup shown is at rest. If the spring is compressed 6in. how high (h) above Equi. will the 16lb. weight reach? Max Velocity? I'm using U_1,2=.5k(x1)^2-.5k(x2)^2 (Potential Energy) I know it is a simple problem but there is something i am not catching. so far I have tried this: 16lb.(h+6)+[.5(15)1.06in.-.5(15)6in.]=0 1.06in=distance weight alone compresses spring I know this is WRONG. Where am I WRONG?