[填空题]
A marble of mass m and radius r rolls alongw *l/bxymv 4557 y2lgc*dw dyt the looped rough track of 1rkzj ll55f (sh3 ab;lFig. 8–58. What is the minimum value of the vertical height h slz( hl1jr fb3a5k5l;that the marble must drop 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
