[问答题]
A large spool of rope rolls h2 n zo ml7+tn0d/7exqq2k kq(on the ground with the end of tfx5f7 tupxdh7 p/esx l:5.cr1do* t :uhe rope lying on the top edge of the sx:prt7u*h1d/ e xx5.o5utf d7fc:plspool. 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 rope unwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
