[填空题]
(a) A yo-yo is made of.lkw; e.(eh q84vyoil2bpsf .,rq uz- two solid cylindrical disks, each of mass 0.050 kpl6rl *3x* .f .e wvpqp+7a: tukpln4pg 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 yonapp4p+p 6*3 pl7lqul.wx e*f. vkr t:-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
