[填空题]
A marble of mass m and radius r rolls along the looped rough track of Fig k0n hk8pagb14+v(huq-+ *nuft ylc /s. 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 q-+ v fy(t/uhnl +*sucof the loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
