[填空题]
Suppose David puts a n9q 3,y ki;,ja+wyubg mea 23k2hx; to0.50-kg rock into a sling of length 1.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest 3m22tao ; kexhto 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
