[填空题]
Suppose David puts a 0.50-kg rock into a sli49d0d lpz lmn(pe6r )3l0gimdnyb6dn sk))0 aeg of length 1.5 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 tbs)e a0)d6kn yhe torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
