[填空题]
(a) A yo-yo is made of t /3opi:g z-sk)gy.v ggwo solid cylindrical disks, each of mass 0.050 kg anem2,pa qj jf6zb+8ch+ d diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and diameter 0.010 m. jcf2b zqj+,p6em8+ haUse 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
