[问答题]
A large spool of rope rolls on th/ a.w q+iywd y0.stq;ye ground with the end of the rope lying on thvzoqs (b *d7jv2 y/ab2e top edge of the spool. A person grabs the end o(*z2jbaodyq7/ vb 2sv f 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
