[填空题]
Suppose David puts a 0.50-kg r6 pucw)a /cd4hock into a sling of length 1.5 m and begins whirl;uq mt rjy*75*/blcm ming the rock in a nearly horizontal circle above his head, acceler/lq*r7y t m*bmj5muc ;ating 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
