[填空题]
A marble of mass m and radius r rolls along the looped roum+zh7 v57,vya f :ok5bjop k3jg*mr 2r+h st6lxsfgr- qp* . uz0a3vj0qh 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 the loop xrrsj0zq.0rf +lmvh2*3*p6squt- agwithout leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
