[填空题]
A 2.30-m-long pole is balan p4:zvvegaryxhf767) ced vertically on its tip. It starts to fall and its rvf 7x:ph)z76e4yvga +4sxzwlq64 iw:f 4khd4v. chad.fv +iw66qnqlower end does not slip. What will be the speed ofivsknq.w qh+ : .64wwdf4d6lqhx4+ic f v4z6a 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
