[填空题]
A marble of mass m and radius r rolls alonl8yjn l oavw o/8h0o,,g the looped rough (u8f4udz wkfmg3l7 *ex)g3z htrack 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 point of the loop w73*f hue83kmzgd z g)wuxl4f(ithout leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
