[问答题]
A large spool of rope rolls opdyy/) xqrkp iv6l+k.2jsu4 ;n h5+f3 sg;s+bg)l5 d54z gftdydt-sazthe ground with the end of the rope lying on the top edge of the spool. A person grab t azg+f53-;gs54sdl+5gdy) fdtshz b s 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 of mass move?
Post time 2025-2-18 20:00:22
