[填空题]
A 2.30-m-long pole is e 3ft o148 3b c3iuuac8iy3obzbalanced verticaafb) 64hq y o-d 5ld)vff66+wykqd3nj lly 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 grou6ad-fk4qffqy+ vl )o6y56h d w )bdjn3nd? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
