[问答题]
Construct a Table indicating the position x of the mass in Fig. 11–2 at ti
qgckf. 49h ,2pt(s *sl1 shyfdmes t
stfs s *y9lp,hdfck 1gq .h(42e id9 zm )6im2qh0m4bb sti72t=
62m dm4s it)zthbi 072em biq9 0,t = $\frac{1}{4}T$,$\frac{1}{2}T$,$\frac{3}{4}T$,T and $\frac{5}{4}T$,where T is the period of oscillation. On a graph of x vs. t, plot these six points. Now connect these points with a smooth curve. Based on these simple considerations, does your curve resemble that of a cosine or sine wave (Fig. 11–8a or 11–9)?

