gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope ro j lgu ceh6xdbq.q(m3.b/ a7+xlls on the ground with the end of the rope lying on2id7n r/ uxy 6at.qfg+ the top edgx 7dnur.i2ga+ q f/t6ye 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. What length of rope unwinds from the spool? How far does the spool’s center of mass move?

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