[填空题]
Suppose David puts a 0.50- iek2n3x5s msje0g *7ukg rih; u5o mrw.i9pak(:cp)2h vk ock into a sling of length 1.5 m and begins whirling ik;wk 2 (acoh 5ipru h:vp.m9)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 where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
