1. The problem statement, all variables and given/known data A partridge of mass 4.94 kg is suspended from a pear tree by an ideal spring of negligible mass. When the partridge is pulled down 0.100 m below its equilibrium position and released, it vibrates with a period of 4.17 s. When it is moving upward, how much time is required for it to move from a point 0.050 m below its equilibrium position to a point 0.050 m above it? 2. Relevant equations 3. The attempt at a solution Well, I've already solved for the k of the spring to be 11.21, and that the velocity at the equivalence point is .151m/s and the acceleration when the mass is .05m above the equilibrium point is-.114 m/s^2. I'm assuming that I'll need to do some type of integral from -.5 to .5, but I have no idea which equation to use, or how to approach this problem.