gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope rolls onl8kq7 czrcvlz3;1 -yl the-ykl qq,eb- l* 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 rb y,-qe kql*l-olls behind the person without slipping. What length of rope unwinds from the spool? How far does the spool’s center of mass move?

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