[填空题]
A marble of mass m and 3l rmk x8y8 m ,i;zi3yv/s-gahdsjx/07yyui) v;w 0oo radius r rolls along 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 theoov; 0)yy7 iwu 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
