[填空题]
Suppose David puts a b5mcvg6 nj r*/0.5i4ujx /g47 fbz gkxp7*fs5z*h 0-kg rock into a sling of length 1.5 m and begins whirling the rock inji4f*spbkzh*f5g 7/g uzxx 74 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
