[填空题]
A marble of mass m and radius r rolls along the looped rough trac 6ut0; iwzaq*ek of Fig. fu 3l ;(uuo7bi,x- zfg8–58. What is the minimum value of the vertical height h that the marble must drop if it is t3z uou ;,-fig 7fxlbu(o 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
