[填空题]
A 2.30-m-long pole isx5ps,ko o527pu w2:vjbwso0p balanced vertically on its tip. It starts to fall and its:e f9 1s7xbuhi lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground? [Hint: Use conservation of energy7ue1h xsfb:i9 .] $m/s$
Post time 2025-2-18 20:00:22
