gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope rolls on the ground with the en9/c68 zy jtmyi7vn rt/vt8xfn.fq) hc2.yw5ix* s 4oqd of the rope lying on the tovnoq /qw).s* rt4n 5fcx.hiyx t2v7f 8p 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 of mass move?

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