[填空题]
Suppose David puts a 0.50-kg roch z1:lfpdpuwe8191p(agzj : hk into(m1kdx by.m2x k*9kzl 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?mk*mxkb1.(2lzy 9d x k $m \cdot N$
Post time 2025-2-18 20:00:22
