[填空题]
Suppose David puts a 0.50-kg rock into a sling+2;o bdpt7icv of length 1.5 m and begi* kbv. nj4p(emns whirling the rock in a nepv 4njb*m.(ek arly horizontal circle above his 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
