[填空题]
Suppose David puts a 0.y9p q u/* keeuax7r4w;n ;mr+u50-kg rock into r ia ve,0:nb.f.s 4 zyn.mhu+ha sling 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. Whuz,y.bf+ 4nhmh:0a vsinr e. .at 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
