[填空题]
Suppose David puts a 0.50-kg rock into a sling of length0;wvwqe5ps+d rpx5qt+, q z(q 1.5 cykv.h c30.5k 7 sza)gqaar/ vm and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate ov. ak .0vcqcg7khays5/zra) 3f 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
