[填空题]
A marble of mass m and radiuxeq.( p+xsk27sfu ) ehs r rolls along thex0r cpy xf;v.qz 0l-t88(mryq looped rough track of Fig. 8–58. What is thqzx0xc0myryvtpr q; f-8(l8.e 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 $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
