[填空题]
Suppose David puts a 0.50-kg rocw )v j,i(+16x8rkoqrr uhn9wkk into a qww:q z65ni/isling of length 1.5 m and begins whirling tzi5iq qn6ww :/he 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 does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
