[填空题]
A marble of mass m and radius r rolls along the looped r tt d.iw;0ic)fough track of Fic+ajtzr.2k0 p g. 8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the higtzk20p+ja .r chest 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
