[填空题]
A marble of mass m and radius r rolls along 5t een2: y8:drl qk(yythe looped rough track of Fig. 8–5 - lg1dma*s xqrvge+1hfxn/)-8. 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 withosq-/d h+1g1v lnx* axf e-r)mgut leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
