[填空题]
A 2.30-m-long pole is balanced verticallyer5geiq/2:7wav .aie on its tip. It starts to fall and i.63xnr yoq9x nts lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground? [Hintxny nx q96.or3: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
