[填空题]
A marble of mass m and radiurkg8 upj8 (o3bs r rolls along the looped rough track oop9 hjaw2n h*u6+r8kof Fig. 8–58. What is the minimum value of the vertical height h that the marble must drop if it isao w6h p8k9ujn2r*o h+ 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
