[填空题]
Suppose David puts a 0.50be1g8w yym .p/-kg rock into a sling of length 1.5 m a2hcv sjm9 vd:et8i 50ywd-f,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,c5:-2td jmf ew iv8shy9 adv0.0 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
