[填空题]
Suppose David puts a 0.50-kg rock iiowv2b;xmp,l h6/0w q,j z9o bnto a sling of le 4f4(05pm igrr;nvmz angth 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 torque required to achieve this feat, and where d; fzr(gmmrp5i0 a44vn oes the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
