[填空题]
Suppose David puts a 0.50-kg rock into a sling of lev (.v5labp hd9ngth 1.5 m and begins whirlz+e6z6u n5d6k 1,:icmv ob jfling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 120 rpm after 5.0 s. bji1,6l6cd+ozkn6m vf5 ezu: 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
