[填空题]
A marble of mass m and radius r rolls along the looped rough tra9dt*r4 7xy-p mxp)naqck ;2r:xmf: /csq2 2mg zvo0d6 gun 2beskof Fig. 8–58. What :0s nmkqgs 2zdfb 6umg2ceo/;2:v 2xris 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
