gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope rolls on the ground wt.t(la*iy/ (t9*jy mu(qz uv with the end of the rope lyibg kfi0300qt 5k;pyojng 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 q gyo0jpt 0 ;0kb35fikwithout slipping. What length of rope unwinds from the spool? How far does the spool’s center of mass move?

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