[问答题]
A large spool of rope* 5jkmr.u3qk/b;iow x rolls on the ground with the end of thfnqf k:-+* zuje rope lying on the top edge of the spool. A person grabs the end of+ u-kq*f n:jzf 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
