[填空题]
A marble of mass m and radius r rolls along the looped rough trp;.9q8dsghw-e:d 4xb,rvk i /jm*o y g0 uo1duack of Fig.7 mrkn rop:tll),w8st0 9+ sju 8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest point of+7ur9,j8k swlno l 0tmt)sp r: the loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
