[填空题]
Suppose David puts a 0.50-kg rock into a sling of * h).bvpcn+mjlength 1.5 7 wklk4ybp g,xbms/h-) m+k9qm 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 rem m bsqk,lw47/k)-y +hpg9xbkquired to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
