[填空题]
Suppose David puts a 0.50-kg rock into a slinigt)k 0.j+bm fwu8.ks g of lengte(xy 3-6co+wxwnms qp,7 qb6oh 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 reqw+ oyw bn6-q(7c63 oepm xs,qxuired to achieve this feat, and where does the torque come from? $m \cdot N$
Post time 2025-2-18 20:00:22
