[填空题]
(a) A yo-yo is made zd2wto.4t,o vv u9 9y6d pn,jgof p)1pi9 8o1br6kycgc gtwo solid 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 diameter1g1cp8i9)b yr cgpok6 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
