[填空题]
A marble of mass m and radius r rolls along the looped 4kk1:+*cfenaykrit7rough track of Fig. 8jfob.; v(4 cz: rnrpu5 ;ieii3–58. What is urpcie i4bj :v(3;.r5ni; fozthe 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
