[填空题]
(a) A yo-yo is made of two solid cylindrical disks, each of ma5/9t0 cg7sj* f*hozb;mwda y+bs 2azess 0.050 kg and dim0so+wz7*bytgb a cd2ea 5; j/ hfz*s9t1g+xau/bed ; ameter 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-m-long string, iag;e b/tu1xd+f it is released from rest. $m/s$ (b) What fraction of its kinetic energy is rotational? %
Post time 2025-2-18 20:00:22
