[填空题]
Suppose David puts a 0.50-kg rocogjs((p8wc7 y.q ig2wk intcft5dl+. 6vfh21qgwm o a sling of length 1.5 m and begins whirling the rock in a nearly horizontal circle above his head,6h+ wg c 21tlf.q5mdvf 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
