[填空题]
Suppose David puts a0i,7t q7 n dswc+3kp (3gsijuj 0.50-kg rock into a sling of length 1.5 mwa+d pw,o1rxf gn wlu2/ fhq/i8t0ccv /(1.vw and begins whirling the rock in a nearly horizontal circle v(0wv cca8.i1uoq,dg1x f /wr wwp/ntf/ h+2labove 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
