[填空题]
A marble of mass m and radius r rollsxgbblhz 5f9+,+km36w (jn drc along the looped rou l7d6*kts *ogyytnb.0gh 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 loop with70lbg*tso .dk 6n yyt*out leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
