[填空题]
A marble of mass m and radius rx9ph 62z gabu* r85 fu6dz8oikrmp /+yd olls along the looped rough track of Fig. 8–58. Wfy8r5zipu 8 ddm/+ o6khat 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 leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
