[填空题]
A marble of mass m and radius r h:5bhoy(s3em8( b i.izvo4 jvrolls alonr*qrwq b( q h1f)iz*w)d6i.ysg the looped rough track of Fig. 8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest point of the qqdr *1( )*). ify6zbwhs wqriloop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
