[填空题]
(a) A yo-yo is made of two solid cylindrical disks, each of mass 0.05ww)g*e7;9i vu lsa4bfr.yu 4g.,zan y0 kg anp)j 0s* l,0(h(k ofxvzdhdo p6oq,s 0bd 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 yh(,dq0 bsloo xp*zk(s 6v)h0 pj0o ,fdo-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
