[填空题]
(a) A yo-yo is made of two solid cylindrical zu9;to5k94dttvg fi7 h7b* n6axayq1 disks, each of mass 0.050 kg aj /7ox7 bjj01l gedn,dnd diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and diameter 0.010 m. Use cond7oj0bld1xn/je,j g 7servation 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
