[填空题]
A marble of mass m and radius r rolls along the looped rough tra2zh)cga.jmvn ;j pb03ck of Fig. 8–58.2c j0zn;)v 3ap g.mjbh qem o5yr2 k*g,.8hyrk What is the minimum value of the vertical height h that the marble must drop if it is to reach the highest.,y25o8r *k gr ymhqek 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
