[问答题]
A large spool of rope rolls on the ground with the end ol ;g2we8 .vzky 7e1ppff .cn .f*zuzswe9-vxq5br v7z3bg))uz 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 far does the spool’s center bzvu3)bu5q x-f7n9czvr .w.gs e z )z*of mass move?
Post time 2025-2-18 20:00:22
