1. The problem statement, all variables and given/known data A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. When the amplitude of the motion is 0.090m , it takes the block 2.52s to travel from 0.090m to -0.090m . If the amplitude is doubled, to 0.180m , how long does it take the block to travel from 0.090m to -0.090m ? 2. Relevant equations x=Acos(ωt+∅) 3. The attempt at a solution Ive found the period to be 5.0s, angular frequency to be 1.26 rad/s, and ∅=1.05 rad. Rearranging above equation for time I got (cos-1(x/A)/ω)-∅=t, but this gives me disproportionally large answers. Any suggestions?