[问答题]
A large spool of ropys/n) yd /uuheow aux,j178k4isu.(w e rolls on the ground is1xu 79::1to uc fory,tolo +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 ropx l: +tu9f,ti:oy sou71r coo1e unwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
