[问答题]
A large spool of rope rf v dqw/sr.:0holl8r7xzt 49 cs6 p qdo4,j3mdfsj:kjr j:s on the ground 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 person without slipping. What length of rope unwinds from the spool? How far4 84,tm7q6z:djr:frp9skjcjd3j o sx does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
