[填空题]
A marble of mass m and radius r6 khw2tb6c *0xu) /.vscy *g2xyvsi io rolls along the looped rough b*ihelt0 30rk tog:x.track 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 of the loop without leav xger *ki:.0 l0b3thtoing the track? Assume $r\ll R$ and ignore frictional losses. h = R
Post time 2025-2-18 20:00:22
