[填空题]
(a) A yo-yo is made en.h60 *l-ntm b6lgrp of two sol3pk-;sr1bqyo rt h t 7j0)adf(mf m3;pid 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 0 ;yjmrk3(7oap-hmdtq1st)r3fp ; f b 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
