[填空题]
(a) A yo-yo is made of two solid cylij(c/3l sa* euxp;mb+l sc)g-hndricatel yamh(+*8b11l :pcgr5ys2ho; r z.antky3 l disks, each of mass 0.050 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 the linear speed of the yo-yo when it reaches the end of its 1.0-m-long string1;ypt5bma:2t 1scnl*khy +rz38o( a e r.ylgh, 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
