[填空题]
Suppose David puts a 0.50-kg rock into a sling ofu0:xnb j4 nus) l/mieec *yg,x,ength 1.5 m and begins whirling the rock in a nearly horizonta /m, eiyx*g,ecl 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? $m \cdot N$
Post time 2025-2-18 20:00:22
