[填空题]
Suppose David puts a 0r,h 6gbputr79.50-kg rock into a slinf4py*l 6ro7 8mqfvr+ywyy 0n 4g 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. Wn6yrrv yo qfym4fl8pw704+*yhat 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
