[问答题]
A large spool of rope rollqt;.d/zj *5qey qv/oh s on the groun,/tkj 1fvi,jm ix5,lu q02 moyd 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 L, holding onto it, Fig. 8–50. The spool rolls behind the pers1 kvi qx/ l2ji0f,5,umty omj,on 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
