[填空题]
A marble of mass m and radius r rolls along the looped rough tr 8gj kixzm5)xb /o6dcj6 v;o;tack *c4ygunhm.( v 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 loop without leaving the track? Assuv(gc*h 4mu.ny me $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
