[填空题]
A marble of mass m and radiljnsc(r 23,y6 gnl;sfus r rolls along the looped rough track of Fig. 8l77(pq m3ee z;bfik 6f–58. What is the minimum value of the vertical height h that(iep e73fq;m6 kzl7bf 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
