[填空题]
Suppose David puts a 0.50-k/.(jfr. :fc pm4xy;zk6hg ok ug rock into a:cc;br+i(din im v,5*ror k7 g sling of length 1.5 m and begins 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 to achieve this feat, and wheibc:o;(r rvi*5rm gd7ik,nc + re does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
