[填空题]
(a) A yo-yo is made of two solid cylindo3bq(h k/d pq6w;r2s(h.18au y*ji b-kbf cevrical disks, each of mad;0vp:0.g8xn3x qqs75ph * ikt l)jd w9na bbrss 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 ojl nsnq: 8w9)0prd b3.bq dti0xgxapkh 5;7v*f 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
