[填空题]
Suppose David puts a t5))e/ wxus8 htbzkv ikjr5qw ;so )j1 49bcw30.50-f 3x7 v9(too)bb9vxpq kg rock into a sling of length 1.5 m and begins whirling the p9 3 bt)x7 (qvoov9fxbrock 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 where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
