[填空题]
A marble of mass m and radius r rolcy-jbha/r7 aif1ys 4e( pb,n- ls along ju 7)/qu.( r6 ohixrfbthe looped rough track of Fig. 8–58. What is the q 6rf /uo(bj.xrhu i7)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
