[填空题]
A marble of mass m an e3hts g.k*qw)d radius r rolls along the looped rough track of Fig. 8–58yum h-o1x5 j:yim2lh 8. What is the minimum value of the vertical height h that the marble must drop if it is t 5iyu1x8-yhho:2jl m mo 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
