[填空题]
Suppose David puts a 0.50-kg r9os7rg nq+szc.tqy6am2*q;cq y f0 :y ock in *pz bp01jke+wnh +y0 7*y1tnxs;gnn oto 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 torq oeptsk0 w 1x*z1bnp+ n;ygh7* njn+y0ue required to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
