[填空题]
Suppose David puts a 0.50-kg rock int50orf0x/x l)d,eodq zo a sling of lengtou;jo5x*0g:t(puv xi h 1.5 m and begins whirling the rock in a nearly horizontal circle above his( vupotig : *u0ox;x5j head, accelerating 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
