[填空题]
(a) A yo-yo is made e,xw ncu+pp.9ki9j*1q f* gslof two solid cylindrical disks, each .86qkqqpmt15zms vzm6 )0j o, jdr.nuof mass 0.050 kg and diameter 0.075 m, joined by a (concentric) thin solid cylintqz)j6, uv5.s od.08 jq qk m6zmpnrm1drical 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
