[问答题]
A turntable of radium/,vm.aq,word ug(7j87 qzjv csg /2lkaj/2-8isf7w d. lgsa tz73 jns $R_1$ is turned by a circular rubber roller of radius $R_2$ in contact with it at their outer edges. What is the ratio of their angular velocities, $\omega_1$ / $\omega_2$
Post time 2025-2-18 20:00:22
