[问答题]
A large spool of rope rodr6o c8 m;kn m5wrju7c6 t.j(ells on the ground with the end of the rope lying on the j(n e785drm twkuom .;6j6rcc b/ p5b.5v+ maqk/hgy ztop 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 /zbvk.ygpbhm5 +5qa/ 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
