[填空题]
Suppose David puts a m/ol,;jlda.,*spbuo;j,o/i ue bvy (0.50-kg rock into a slinv 2h3bk7k.dza ) zxdy.g 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 doeby2 3z )hdakk.xdvz 7.s the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
