[填空题]
Suppose David puts a 0.50-kg rock into a sling of length u i6jd,1n,kee1.5 m and hstgwve4 sib;ijmy.*/) 2 8 jvbegins whirling the rock v *.84i) gysetjv/js2w ;hi bmin 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? $m \cdot N$
Post time 2025-2-18 20:00:22
