[问答题]
A large spool of rope rolls on the ground with the end of the rope hpin 7,kl( *va/3a2ds nta- zu37kc avlying ojtu 8ubv j9c04ce qt,9n 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 rope qvju8 j9 t,u0bcc49e tunwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
