[填空题]
Suppose David puts a 0.50-kg rock into a sling ob6b n2o2rna.rx i5: jsf length 1.5 m and beg5wb h22-kuqvw ins 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 is the torque required tkvb5quh2w -w2o achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
