[填空题]
A marble of mass m and r6my)sk ,-c uyhc1q6 yuabvc1el2 m 51hsdius r rolls along the looped rough track of Fig. 8–58. Whm 15vbces2l1hat 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? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
