[填空题]
Suppose David puts a1 dktj ixw4jgdkf x);q/(g(j 5 86lvnc 0.50-kg rock into sequ(6;/ tjl u:gh0b sjmr,5na sling of length 1.5 m and begins whirling the rock in a nearly horizontal circle abovem,/usu; jben5j :( rhl0g t6qs 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
