[填空题]
Suppose David puts a 0.50-kg rock into a sli0bij +si3a2p/u(o ) uxondw 5zxsy8vo d,)xv+ng of le 16 j6e zfsl8pqzw/jtw2 wz;0ength 1.5 m and begins whirling the rock in a nearly horizontal circle above his head, accelerating it from rest to a rate ofl2e80sjj6 epwtfz 1w/;6zwqz 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
