[填空题]
(a) A yo-yo is made of two sol j yo--b3j2iguk,3 uue99n1 i 0oo 2.z kwib6wjdtzt9zid cylindrical 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 string, if it is released fro n63w.uo9zzi kj02 k tbt9ed9zw,uo 1im rest. $m/s$ (b) What fraction of its kinetic energy is rotational? %
Post time 2025-2-18 20:00:22
