[填空题]
A marble of mass m and radius r rolls along thu1ca5i rxrnr f*-;s*ie looped rough trmd f 11.wko3cwack of Fig. 8–58. What is the minimum value of the vertical height h that the marble must w1fwmcok31d.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
