[填空题]
A marble of mass m and radius r rolls alo: f4t yei/r7aev7ix m*ng the looped roughh.fm(x ib*:emd 8zf2:vkedf3 track of Fig. 8–58. What is the minimum value of the vertical height h that the marble must drop xi:eze. d*v2 fhmf kd3fb:8m(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
