[填空题]
A marble of mass m and radius r rob ol,fe+3mc )4j7togblls along the looped 0*n,ecogom: sdn zad-cg *0q8 rough track of Fig. 8–58.8z m 0gcaeds:nn- d*q,g o*c0o 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 loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
