[填空题]
Suppose David puts a 01h4 o8b u t1ir mrpg6p03ap)n vgu)g0j.50-kg rf/o2 -cir )tfbock into a 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. What is the torque required to achievfctor f i/)2b-e this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
