[填空题]
Suppose David puts a 0.5d dgrj c6h6--x0-kg rocb5ed isb(im hs25l 7-ok 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 achieve this feat, and where does the torque comemlbh255-sb( sdoei i 7 from? $m \cdot N$
Post time 2025-2-18 20:00:22
