[填空题]
Suppose David puts a 0.5xy9 3edu jn(8 s73q*hhk p8pfzc bfl.yf(3 ldcsjc6;ddx;pdp.7/x, f0-kg rock into 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 is the torque required to achieve this fead .lfcxb/;fs(;7ypc dlp6 x,dcjf3 . dt, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
