[填空题]
Suppose David puts a 0.50-kg rock into a ,u z tio1 b:-av+d;h4zou7wz tsling of ler pu i4)wsk-c 14usrt*gl h1+q57dbiwngth 1.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 120 rpm after 5.0 s. What i4swut5cg hu- qwkdib sr+7)1* 1l4pi rs 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
