[填空题]
A marble of mass m and radius r rolls along the lo g: kccf1qj(qam;dj+ql03u .syuc8w *;bjip 4oped rough track of Fig. 8–58. What is the minimum value of the vertical height h that the byu8p j;*w 4icmarble 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
