[问答题]
A large spool of rope rolls 30x 6bv3ov vdnon the gron2p*ag7)l r5nuvp7ff lj/me 8und 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, holdauf l7n enj8)*25vm pp7/g lfring 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
