[问答题]
A mass m is connecte r)ylu asmz n 7ry5,4tym*m6j ykj-x61d to two springs, with spring std,( k+gf-,ari gsz,ql 4wzqrc +4zc8l iffness constants $k_1$ and $k_2$ as shown in Fig. 11–51. Ignore friction. Show that the period is given by
T=2 $\pi \sqrt{\frac{m}{k_{1}+k_{2}}}$ .
