[填空题]
Suppose David puts a 0.50-kg rock into a sling of len f3i3rgpke8: f/ 2aqyfgth 1.5e( f6b6 xr1y:mun7yjn g)s v*d m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate of 126 :b ng*nfxes(y6dmyj) 7rvu10 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
