[填空题]
Suppose David puts a 0.50-kgbcys-( 2-)de nei5 tum(4tx cz7*8 g,zb irgob rock into a sling o6zyo.d-y /xp trhc9e* f 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 the9/cyto* yr6pz.x-d eh torque required to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
