[填空题]
A marble of mass m and radius r rolls alfw64l ;kgh 9arongm n967cyn905 llq.ko3 cgl xbr the looped rough 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 highest l o9cc6 g53qlk0nrb.nlxym97 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
