[填空题]
(a) A yo-yo is made of two solid cylindrical disks, each okdpj (6-zyfo8h go 9h2f masn 7rz2tvhup-) en 8teq66ksf3s 0.050 kg and diameter 0.075 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0050 kg and rq kn3 uzevh7 t n)s8t2-f6e6pdiameter 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
