[填空题]
A marble of mass m and radius r e q3mjo t,t 2b7:p/dzm0nm 6acfl0bc-rolls alon9y y :yg*31dnscddlo6g the 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 highestd ldy:gn1y*3 dsy6c 9o 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
