[填空题]
Suppose David puts a 0.50-kg rock intoy k yct;k6zo9dl vt).5 a sling of length 1.5 m and begins whir3i- ta2a 4yeer2e3nnh ling 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?i3e2-yt2 4 nree3a nha $m \cdot N$
Post time 2025-2-18 20:00:22
