[问答题]
A large spool of rope rolls on the ground with the end of yh)ti f.8cl,u the ro.p0i //cvs4 hr u- ;(fykhcc;-gqfdmrpe lying on the top edge of the spool. A person grabs the end of the rope and walks a distance L, holding onu;r/r s hhcvkf(;yc4 cf-m0-.qpdig /to it, Fig. 8–50. The spool rolls behind 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
