[问答题]
A large spool of rope rol-53r9z0 enydbp b:(b(rv . raxo( tdvals on the ground with the end of the dxq) 2-18;bharrp h flhn4cztq9*n9 urope 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 u9h48trrd nqan2c-hq p;fl h9* 1xzb)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
