[填空题]
A 2.30-m-long pole imob 5o:0:iwxpph 3k(as ba.3byffzk8p+y9y(u* v6f0d2 a: d eapmbxiip - lanced vertically on its tip. It starts to fall and its 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 oupb6yid: a-y+bkvmfpidy 2 ep3a09( xf .*z 8ff energy.] $m/s$
Post time 2025-2-18 20:00:22
