[填空题]
A marble of mass m and radius r rolls a -f9 -tfw;r(12yf zhkxnaehf(long the looped roug) 6 /7cpcmyf5ma-sik bh track of Fig. 8–58. What is the minimum value of the vc cf7aim -y5p/k6)bmsertical 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
