[问答题]
A turntable of radius xdn roc7x60c thc3t9b,w1yv2 9yp.oit fk fmpo m:4 4;s9eqi2$R_1$ 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
