[填空题]
Suppose David puts a 0.59:z qy2un0v8y 9gw awo0-kg rock into a rj8y,z w//jh osling of length 1.5 m and begins whirling the rock/w/j o,yj 8zrh 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? $m \cdot N$
Post time 2025-2-18 20:00:22
