[填空题]
A marble of mass m and radius r rolls along theh pgvxm(n,*1 jhr )0bs looped rough track of Fig. 9b)lcaz-zvn,t.2prd 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 loop withtndc b2 p9l.r,zva)z-out leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
