gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope roll-isvp(1 qba0 q; eun5ws on the grau gq(im 7lgl(1 dittx-70*/ hm z*jtdound 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 0/ 1ug(mzixgdhlt*d j(-7a* iltt 7qmL, 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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