gc textbook chapter 8 Rotational Motion (id: edef5090c)

[问答题]
A large spool of rope rolls on the groqr2 r(.y cp0zuund with yt/z(k3j d t- )0kanzfthe end of the 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.0td(z z f) aky3ktj/n- 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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