[填空题]
A marble of mass m and radius r rolls along the loopedn3un0oud 5t6m rough track of Fig. 8–qtlxlo3 5ya 6 4x 9n( y()njgaddz62bj58. 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 wit ld a)( y3zx (46xoq92jly5t6annbjdg hout leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
