[填空题]
A small fly of mass 0.25 g isj:e x d sw1if 0(/.zd;wpl/d vjdv9dg/ caught in a spider’s web. The web v5t(-ysehrnj .l gfnr 38 ib)/bibrates predominately with a frequency of 4.)(/gfbylit r sb8. j-n3n 5hre0 Hz.
(a) What is the value of the effective spring stiffness constant k for the web?$\approx$ N/m (round to two decimal place)
(b) At what frequency would you expect the web to vibrate if an insect of mass 0.50 g were trapped? Hz