[问答题]
A large spool of rope rolls on the ground wwjxko-mo7ttrnii 0(sp5t :+sa : m8+qith the en9g)ppp 9 aumtx3)ta6 m3nkmdl94anp;d of the rope lying on the top edgm)6aa mkpp99;9t3ndg ppxn m4a u 3)tle 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 rope unwinds from the spool? How far does the spool’s center of mass move?
Post time 2025-2-18 20:00:22
