[填空题]
A 2.30-m-long pole is balanced vertical1/r3kzc*h tzv ly on its tip. It starts to fall az3 dtj:,t obixf zo7,6nd 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 conser,od 3 t btxj:zi7,z6fovation of energy.] $m/s$
Post time 2025-2-18 20:00:22
