[填空题]
A 2.30-m-long pole isuk9 ievk*7rpkja ;c711)g 0llt:yk na balanced vertically on its tip. It starts to falle.d;iaifv q9a 2)t hr8 and its lower end does not slip. What will be the speed of the u9q2 tva;edii h)8far.pper end of the pole just before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
