[填空题]
Suppose David puts a 0.50hoj::vq9oqm y2q r 6 tv 6e*mz4du+ca2-kg rock into a sling of length 53 sx7 7*odnmhmh ctv01.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 120 rpm aftem5tn7h3sh c7xod*m v 0r 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
