[填空题]
Suppose David puts a 0.50-kg rock into a sling of le/u:v bg2a+d 4sqj)z6bvgsuoqg/ * uh3j38 yoxngth 1o +5lx .kj1tlf.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it fromjo +1fxk l5tl. 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
