[填空题]
A marble of mass m and rad b)w,m8wv l u4wdm45qqius r rolls alx )cxbf:+jo;9 wnmj3bong the looped rough track of Fig. 8–58. What ibwbxx; c 3m):on f9+jjs the minimum value of the vertical 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
