Consider the following spring system.
$c_1 = 8,\quad c_2 = 10,\quad c_3 = 6 \\ m_1 = 3,\quad m_2 = 6,\quad m_3 = 2$

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Write the elongation matrix $A =$$\left[\Rule{0pt}{3.6em}{0pt}\right.$$\left]\Rule{0pt}{3.6em}{0pt}\right.$ (Assume that the positive direction is counter-clockwise.)
Write the spring constant matrix $C =$$\left[\Rule{0pt}{3.6em}{0pt}\right.$$\left]\Rule{0pt}{3.6em}{0pt}\right.$
Write the stiffness matrix $K =$$\left[\Rule{0pt}{3.6em}{0pt}\right.$$\left]\Rule{0pt}{3.6em}{0pt}\right.$

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