[问答题]
A large spool of rope rolls on t
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pubms(4e82m:i1b6iyzw t .t( e fiqfalq-.+ t ground with the end 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 r
eb4 qut ms2zfy-8wf(iq1lp ( it6m.ebt.ia:+ olls behind the person without slipping. What length of rope unwinds from the spool? How far does the spool’s center of mass move?
