[填空题]
A marble of mass m and radius r;/ zusfilzhn*: x:m7f0e+w)h *vq dpv rolls along the looped roughpq ha+, . 3ypz.o2suc.hohe1 i track of Fig. 8–58. What is the minimum v.2a1eo i pu p,hoqc.+.shy3h zalue 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
