[填空题]
Suppose David puts a 0.50o )bq;ua:;uxelr pf6/ a21)c - mxdgpl-kg rock into a9ymy,7flv jhcp*3q /u sling of length 1.5 m and begins whirling the rock in a nearly horizontal circle above his head, acceleray,f u7cl/9yp v3jh mq*ting it from rest to a rate of 120 rpm after 5.0 s. What is the torque required to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
