[填空题]
A marble of mass m and radius r rolls a kn4avi,h)dhiu +f*f;long the looe/-ismju*j pes ;bt6 /ped rough track of Fig. 8–58. What is the minimum value of the vermj ejps b st/-6/u*e;itical 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
