[问答题]
A large spool of rope rolls rxi;p3y(s,tx*fm ua 6on the ground with the end. 7 e-9zbg0e wda2g.ohz,jdde of the rope lying on the top edge of the spool. A person grabs the end of the rope and walks a distance L, holding onto it, Fig. 8–50. The spool rolls behind the person without slipping. Whatgo.ew g7.zddjz, b9e 20eh- da length of rope unwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
