[填空题]
(a) A yo-yo is made of two solid cylindrical disks, eb ; rt2ewiw05tach of m faqxatknsji z843/*f30go gp 1:3pkv ass 0.050 kg and diameter 0.075 m, joined 0n8pzp3kj fk3qofx3*gsg1:t 4iva /a 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
