什么

A metal rod, 0.5 m long, has a rectangular cross section of
area 2 mm2.
(b) The rod is firmly clamped at the bottom as shown in the figure below,
and at the top a force F is applied in the y-direction as shown (parallel to
the edge of length b). The result is a static deflection, y, given by
y = 4F(L)^3/(Ya(b)^3)
If the force F is removed and a msss m, which is much greater than the mass
of the rod, is attached to the top en dof the rod, what is the ratio of the
frequencies of vibration in the y and x directions (i.e., parallel to the edges
of length b and a)?

图片很简单，就是一个长方体金属棒，长为a，宽为b，高为L，底部被固定住了，沿宽所在的方向施加了一个力F（即宽为y轴）。

求解此题。美国大二的物理题，无能了

高三的学弟表示无能为力，帮顶

求翻译，

一根金属棒，0.5米长，横截面为2 mm^2 的长方形
（b)棒子底部固定，顶部向y轴方向施加力F（此力平行于宽b）。结果，金属棒沿y轴方向偏离了y = y = 4F(L)^3/(Ya(b)^3)
如果此时放开金属棒，同时将质量为m的物体放在金属棒顶端（m远大于金属棒本身的质量），请问此后金属棒沿着y轴方向河x轴方向振动的频率之比?

高三学渣路过……

文科生路过

求助

难道一帮学弟学妹们

求人助阵