[填空题]
(a) A yo-yo is made of two solid cylindrical disks, each of mass 0en:e, tywf(fr 70c 2jo.050 kgf yc0v:.q o1m8rgud*z4s a6e t and diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and diameter 0.010 m. Use cons40gyo8r6u1q * tmzcs ad:fev.ervation 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
