[问答题]
A large spool of rope rolgs*a.ngp c/.p 0oxkg)ls on the groun :xbz8h 24z;pzqcen 3-s,/: gdmcj otpd with the end of the rope lying on 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 person without slipping. What length of roj8n;xd3 2gmzocsb/ pec:h p4 zz,:q t-pe unwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
