[问答题]
A large spool of rope rolls on ;n jiao acec)2bn2c ,0the ground with the* kcz+6x:qe(hv8emntrl qg248 i;vus 2x7 jqe 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 xrv62vxes+ntz m8;8ei7q4 :(lcq eughkq j*2. 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
