[填空题]
A marble of mass m and radius r rolls alongwvenx5x s;d5)tzt 1rnk-0 ca1 the looped7ugu3wvs,a f . rough track of Fig. 8–58. What is the minimum vuav,ug w7 fs.3alue of the vertical height h 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
