[问答题]
A large spool of rope rolls on the ground with the end of the ri f s1uesq n flh+:1.x(s ( c+;icodbal.)q1dpope lying z/f8cq )w+, /wp xli1htug+dhon 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 pert zwc+pdiu /1hq l,w/x+gf)h8son 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
