[填空题]
A marble of mass m and radiust)a-p,n 8ity6zpn j d+ r rolls along the looped ror:v8dr6aiwg 7jnkzt 60h ,l7jp s7zv5ugh 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 highe60ring78 6pska wt5 jrzzl77d:vj v,hst 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
