[填空题]
(a) A yo-yo is made of two solid cylindricaq1k+ xzoa x v5eq.8l67aken v7l disks, each of mass 0.050 lcq/ f.(f pc(f6g g-eukg and diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and diameter 0.010 m. Use conservatiecff6(u.g/ g(c p-qf lon 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
