[填空题]
Suppose David puts a 0.50-kg rock -fs s4 adaw.hazy el 2ix/b,87in 8rl9c:br ou,rs5p5n*uk pg+mto 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 num5rr:gklp +s8p,ro95ucb *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
