[填空题]
A 2.30-m-long pole is balanced verticalxihda9to3g890sxyh - ly on its tip. It starts to fall and its 9-9hgxsix8 od 0a h3ytle 7vidz r4 r)jmy)(m6lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground? [Hint: Use conservation of energvz6)lem7dm ) (4rriyj y.] $m/s$
Post time 2025-2-18 20:00:22
