[填空题]
Suppose David puts a 0.5d n.0jycky(m/; +b kmo0-kg rock into5k-yw ay/vs yr:dddc 4m7zw3, a sling of length 1.5 m and begins whirling the rock in a nearly horizont czwdyw,5syv 7/mdydr:- 3k4 aal 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 from? $m \cdot N$
Post time 2025-2-18 20:00:22
