[填空题]
A marble of mass m and radius r rolls alo-wq lsl i.2+0*ivnq uqng the looped rough track of Fig. 8–58.l0ni-li* uq2sw q .qv+0flivn 7-xxhfe nr:+9 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 without leavifx0eh flv:7n -+x9 inrng the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
