[问答题]
A mass m is connected to two springs, wi,vc14s7d /06dxlgyvy jl2cphpn 7ny- th spring stiffness grlzv1c x77e9 c:o a+dconstants $k_1$ and $k_2$ as shown in Fig. 11–51. Ignore friction. Show that the period is given by
T=2 $\pi \sqrt{\frac{m}{k_{1}+k_{2}}}$ .