[填空题]
A marble of mass m and radius r rolls along the l1 5a9d/fix g2h4fbyppooped rough track of Fig. 34i(c9qko *-lt qtgio8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest point og4(qti3oci9-o* l k qtf the loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
