[填空题]
A marble of mass m and radius r rolls al zsnu m7d d) ihe198,ka9vk6kaong the looped rough track of Fijwbkm n-rf .3pvn+(9ng. 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 leavin.n fbn3k-mjwvn9r( + pg the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
