本题目来源于试卷: Vibrations and Waves，类别为 IB物理学
[问答题]
A vertical spring with spring stifu,, d 1imx (jnc hmqm/q:o7a,ofness constant 305 N/m vibrates with an aib0 m*lk u-p1n, 8r hdm-ko6idmplitude of 28.0 cm when 0.260 kg hangs from -*-nbhlk6,mi0 ku1dmirdp 8o it. The mass passes through the equilibrium point (x=0) with positive velocity at
(a) What equation describes this motion as a function of time?
(b) At what times will the spring have its maximum and minimum extensions?
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