[填空题]
A mass of 2.62 kg stretig s q;xab2/i0rpju0 b*1inf: ches a vertical spring 0.315 m. If the spring is stretcl;y.g) ,x*e q:pkme z:s5kev qhed anl . q;z5xvems,q :gyeke:p* )k additional 0.130 m and released, how long does it take to reach the (new) equilibrium position again? s