gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope rolls on d(wg9 w m3z7zmthe ground with the end of t 1 x,a9/ e4wq ndx3ba+t;malnqhvo13mhe 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 rolls behind the person without slipping. What length of rope unwinds from the spool? How far does the spool’s center m daq+v /on19 1;tbqhx3n,3a4lmx waeof mass move?

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