[填空题]
(a) A yo-yo is made ofof8/)bcg(li5 fof6gw:e --(k npe bb f two so9p c,c6ze03 rhhl xd2wlid cylindrical disks, each of mass 0.050 kg and diameter 0.075 m, joined by a (concentric) thin solid cylindrical huwx9r6lc 2 hz,hpec0 3db of mass 0.0050 kg and diameter 0.010 m. Use conservation of energy to calculate 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
