[填空题]
A marble of mass m and radius r rolls along the lo utng yy0-uerzc4p;, .o nwxpj:3 2jsv+ped rough track of Fig. 8–58. What is the minimum value of the verp3vjx+ w j:ns2tical 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
