[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It5y417,s epm nrb*qd dj stszguy -w47hrj*bq 8v5b: ga/ze9d3atarts to fall and its lower end does not slip. What will be the spee 4tq5b u-*8gy7whb aeg/3ra zzd9:vsjd of the upper 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
