[填空题]
Suppose David puts a 0.50-3q7jx-m8 g hnmkg rock ih/z4i 3wia 7dljrqb.+n+/zmynto a sling of length 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 does the torque come from?b zi/+ d +nmrhj/. q3wlyiaz74 $m \cdot N$
Post time 2025-2-18 20:00:22
