a 2kg mass ona horizontal frictionless surface is attached to the free end of an ideal spring of stiffness k=30N/m. you pull on the mass to stretch the spring a distance of 1m from its relaxed position. when you release the mass from rest, the spring takes over, causing the mass to return to its equilibrium position, and then overshoot the position. by what distance is the spring compressed as the mass comes to rest again?