[填空题]
A marble of mass m and da rkghq)954i 2mq/,r9cx wxd radius r rolls alon1ek4chv .bk lugf (( lp.r;0d(lhxub4 rr/u8ng the 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 the loop withoux h. rl8bbh ufg r(c.k1vudll4/k0eup(;4( rnt leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
