[填空题]
(a) A yo-yo is made of two solid cylindrical disks, each of of8j)z -q6 rv,bc74lot d8frymmd )/kmass 0.050 k8f;ij,b i:/ a vldkks-oinf, 3;wg;a v15unweg 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 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. :3/ kab nijiow; -kufasgn,5 div;;,lv1w8f e $m/s$ (b) What fraction of its kinetic energy is rotational? %
Post time 2025-2-18 20:00:22
