[填空题]
Suppose David puts a 0.50-kg rock into a sling of 80y z d ,)lx.5bbyb+cwtc/nsf length 1.5 m an g/mjklz(sv/ + g,6gobd 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 does the torque come fromg +vbl,/so kz(6/mggj? $m \cdot N$
Post time 2025-2-18 20:00:22
