[填空题]
(a) A yo-yo is made of two solid cylindrical di: w 6hk2+c p8bv1xfii.c bj5s hvas/(ssks, each of mass 0.k/gw k 2k/o40;umme 2 mbjn0rt(bf) is050 kg and diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and diameter 0.010 m. Use conservation of energy to calculate 2 sm r 0 2met/(g04bkikbkm/j)nofuw;the linear speed of the yo-yo when it reaches the end of its 1.0-m-long string, if it is released from rest. $m/s$ (b) What fraction of its kinetic energy is rotational? %
Post time 2025-2-18 20:00:22
