[填空题]
A marble of mass m and rad5) m sxb+b2tncxzd p7-(n uhdbgo5+m,ius uqapb9 a34c7 kmhcj))5 +rrxk r rolls along the looped rough track of Fig. 8–58. What is the minimum value of the v9m7+j)p4uk3xcrk)c haq br 5aertical 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
