[填空题]
Suppose David puts a 0.50-kg rock intj/vgb x*8gp1yxz 2 my8o a sling of lenc(izj(-bttvdpn +hx(tx) .wbzk;8 ; c gth 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 is the torque required to achieve this feat, and where doe;nb(dctv ;t xc+zz(xiw tb(h8pj .k)- s the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
