[问答题]
A large spool of rope (hm /5dviaq3hrolls on the ground with the end ujicub828 .fe9 rn(j ;4xtpcd of the rope lying on the top edge of the spool. A person grabs the end of the rope and walks a distance L;p8.jin4fu c ( ectxujbdr9 82, 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 of mass move?
Post time 2025-2-18 20:00:22
