[填空题]
Suppose David puts a 0.50-kg roco22x i-ix vjqq(ek.nu hcp)1 1k into a sl1c)n zzk-pj ndn)m / v32lo9qying of length 1.5 m and begins whirling the rock in a-l/9 n3)mkn)q1vz nycdz2pjo 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
