[填空题]
Suppose David puts az q;phk.: ng0dpp912ad8q9 lc vj uut4 0.50-kg rock into a sling of length h0ouqmjg)w 981.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 120 rpm after 5.0 s. What is the torque required to achieve this feat, and where does the torque come from?8ghu0 m9 )wqjo $m \cdot N$
Post time 2025-2-18 20:00:22
