本题目来源于试卷: Basic Concepts，类别为 美国物理杯赛(Physics Bowl)
[单选题]
06.49: Three identical Hookian springs iost/tjr* sc++ 8qxc(/v er- t bu;eq.1fpczz8x ; g*yyd e:cx8-2t+j:jy xq jof spring constant k are connected as shown to a mass M in equilibrium. The horizontal platform shown between the springs and the springs themselves have no mass. If the mass M is slightly displaced vertically, the mas zeqxtc :xbj+z8x:jp*; ;j -yge yy fuq.2d8c 1s exhibits simple harmonic oscillation. Assume that the horizontal platform does not rotate during the oscillations.What is the period of the oscillation?
A. $2π\sqrt{\frac{3M}{k}}$
B. $2π\sqrt{\frac{M}{3k}}$
C. $2π\sqrt{\frac{M}{k}}$
D. $2π\sqrt{\frac{2M}{3k}}$
E. $2π\sqrt{\frac{3M}{2k}}$
参考答案: E
本题详细解析:
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