[填空题]
A marble of mass m andn gb0xwz v x*09q4bti. radius r rolls along the looped rough tracpl.adxpl:vv f*6v -1 mk 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 pv l6.a1dvm-*v :px lfof the loop without leaving the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
