[填空题]
A marble of mass m and radius r role s8mgws)hgg:*a-t 3 mls along the loope3-d:unvm nsb/v (n 2ysd rough track of Fig. 8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest point of the ( d32:nm-ysvbusn n/vloop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
