[问答题]
A large spool of rope rolls on the ground wi/b9aoo+ms h uj8lamw8)u- du/th the end of the roaz3(wne48 4k9n)t uorhc/ n yope 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 beh9 yzrk 4unncoaton ew8/(3 4)hind 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
