[问答题]
A large spool of ropy 2guxbe24 0 bw(b;gxwe roll)/f(fbnky /6 d :mcdbuf4af01hal- w ns on the ground with the end of the rope lying on the top edge of the spool. A person grabs the end ( luf fd-h cakdm 4a0:bfwf)n/1y6bn/ of the rope and walks a distance L, holding onto it, Fig. 8–50. The spool rolls behind the person without slipping. What 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
