[填空题]
(a) A yo-yo is made o,j,s uk c .e0i+7yk-f*ul7p9b ey5puh2oqck f f two uaj)e p/: *fgqpx4 4risolid cylindrical disks, each of mass 0.050 kg 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 e a u*i4pr/jpf:4q)xg-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
