[填空题]
A marble of mass m and radius r rolls a)zfiza0.+ et k4md.gnlong the looped rough track of Fig., 1)eiq 4f 5hye2hyadg 8–58. What is the minimum value of the vertical height h thdq)h5i hyey gf1 4,2aeat 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
