[问答题]
A large spool of rope rolls on the guu-t tu4)*p mrrou8 bp,f cc(bpxu0y,rz 1cxr;k*zu 7b3and with the end of the rope lying on the top edge of the spool. A person grabs the end of the ropcp0;cbx1u frxa*uy3 kb7(c,,8rpz bz e and walks a distance L, holding onto 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
