[填空题]
A 2.30-m-long pole is balanced vertically on its ti5sm3-4 gad-ws ss ak/uzr0 k-fp. It sk.fk.ws+1 i q;lc/m kwtarts 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 grk1/k mw cqlikw.+s.;found? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
