[填空题]
A marble of mass m and radius r rolls along 4cwqqyj;zt3e,(mi+ m th 8x hk-k0x)if7n)pnkn e looped rough track of Fig. 8–58. What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest point of t8n -x 7)f 0xk)pkinnhkhe loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
