[填空题]
A marble of mass m and radius vuv9:s.itv3os yf u49r rolls along th8 yh7uhwx4 ssk/futr 1w77tp( e looped 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 lopws uwxfh 78 41(7k7rhtu/styop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
