[问答题]
A large spool of rope rolls on the grougu8 )l.pljbek v;z(a9 nd 3h civ:t 8i/7vc e 87k;bgjdgawith 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 L, ho ta/c3kvvh 7ig8 igc7j:e 8b;dlding 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?
Post time 2025-2-18 20:00:22
