[填空题]
A marble of mass m and radius r rolls along the looped rough t9n:o 6e iw*,y.lylhw zracs yks.0x v rwtay 52;ii7yyp8,k 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 highest po,5 ys.y y2iir7ktawx80y ;psvint 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
