[填空题]
(a) A yo-yo is made of *r5piu0nd9j;cdn.ql cu . p,xe i6ul5 two soli3hqab 1n4 zzl2d cylindrical disks, each of mass 0.050 kg and diameter 0.075 m, joined bh3z2 n 14aqlzby 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 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
