[填空题]
A marble of mass m anz99cg(an gu/o 9k7 u4l-zs8 al3nage nd radius r rolls along the looped roug z-7fab3y,st o1)zsl)vr*kpxtpi6 s9h track of Fig. 8–58. What is the minimum value of the vertical height h that the9 )s,7sxazspt*vp k)31 lo-6ry zfi tb 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
