[填空题]
Suppose David puts a 0.50-kg rock into a sling o(w2ca,cx 1uha f length 1vdgg l5 lkai i05uoq29( .k8zh.5 m and begins whirling the rock in a nearly horizo 2od k08u(lkl.hgzqi9avi5 5gntal 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
