[填空题]
Suppose David puts a 0nx 24v4lj.xhpzlhd 0j* 0b1hk at1pp ).50-kg rock into a sling,ph,zopzp3hri0 t7 ngd 3*y5o 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 torod ,3zz h3y p t5g7*rph,ionp0que required to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
