[填空题]
Suppose David puts a 0.50-kg rock into a sling of length 1.5i1fw ww :bllmv w0-l35 (nu rqk+.cj0djyr8 c 8v25 xovm and begins whirling the rock in a nearly horizontal circle above his head2yqdj8 xcr.ncj (+ov0ur5v 8k , 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
