[填空题]
A marble of mass m and radius r; nw,.r;rqlb*sg 6r(krv dfb+ rolls al*7f2i1j 6m )ucaj (u -ran1xtrmbw sa3ong the looped rough track of Fig. 8–58. What is the minimum value of the vertical height h that the marbjcau( u-na r r1 6ibs)m3jw*1tfxma 72le 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
