[填空题]
(a) A yo-yo is made vq /9z. *tnqxbf-rabbt83no6 of eb). yjp+g,s1vc-waldy xo g9z) m11 ytwo solid cylindrical disks, each of mass 0.050 kg and diameter 0.075 m, joinee+dsyoxz. 19 ) ygp )jc1 ma,-gvw1blyd 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 from rest. $m/s$ (b) What fraction of its kinetic energy is rotational? %
Post time 2025-2-18 20:00:22
