[填空题]
(a) A yo-yo is made of two solid cylindrical disks, e6:sa2gey v bbn0z :xt3ach of mass 0.050 kg ar *h f kznm:is9 6zux;zu1(h4z;d pw1fnd 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 cki hr4nuwsuf9zm61 :(p;1f zdz hz*;xalculate 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
