[填空题]
A marble of mass m and radius r ro*croy *w*m-. kaqrdz/2l7 t khlls along the looped l.nl01oqml5,i 4b rfg/jzu r/rough track of Fig. 8–58. What is the minimum value of the vertical height h that the marble must dql,1 0blj r n4/o5/zim ugrf.lrop if it is to reach the highest point of the loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
