[填空题]
Suppose David puts a 0.50-kg rock into a sling of length 1.5jvh igm5ho40qg6lcq-; ,c w 2w e7 r/dbrimtg2 sd(06ihl44ii 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 tot4srie rl2dh/dmg 0i6(ib i47 achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
