[填空题]
A 2.30-m-long pole is balanced vertica y3ho+ lep1kgr-*+ls blly on its tip. It starts to f nv tswfy ,).(ukan94aall and its lower end does not slip. What will be the speed of the upper end of the pole just before it. u,akws)n( vnatfy49 hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
