[填空题]
A marble of mass m and radius r aert-r 7l80se rolls au;5)zixcda4yf wj2) blong 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 highest point of the)2 5 fi4j;wadc) yzxub loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
