[填空题]
A 2.30-m-long pole is bcvm+ o-, jc;iyalanced vertically on its tip. Iv k97gf: baq:bqt-c0z t starts to fall and its lower end does not slip. What will be the speed of the upper end of the polea ::-t7f0b kqz9cbg qv just before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
