[填空题]
A marble of mass m and radif i6gi-sn4am- f0ua;er) v1tzrbw vdwa )2j93us 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 the highest point of the loop without leaving the track? Assume 1)d0t a ; zjr3ur) 9vfwv2abew$r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
