[填空题]
Suppose David puts a 0.50-kg rock into at mb55xva079 ga2bzm trq/)q r slenr q2 8v*1pqn 9xzft6g4jn-sing of length 1.5 m and begins whirling the rock in a nearln-s 86ef4* 2tzxv 1qrnp qj9gny 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
