[问答题]
A block of mass m is suppn uk,:a9m) gkported by v m6c (hz+s qmfo2,t lm3h 9b4sdp9k:rtwo identical parallel vertical springs, each with spring stiffness constant k (Fig. 11–49). What will behzfho23v bc9+p m m,ss4 6k9(trq ldm: the frequency of vibration?