[填空题]
Suppose David puts a 0.50-kg 7 s7 u.)anfvqfrock into a sling of length 1. /ajyem5c dk)05 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 120 rpm after 5.0 s. What is the torque required to achieve this feat, and where does a0dce5)/ymj k the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
