[填空题]
A marble of mass m and racx0 fxz:b8/r gdius r rollsy:ow g+.d i;bp along the looped rough track of Fig. 8–58. What is the minimum value of the vert+.; ioygwpb d:ical 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
