[填空题]
A 2.30-m-long pole is balanced verticacq 53h2rnnf t/lly on its tip. It starts to fall anm95 jj4qiv,46z8 fzfo c5 jklvd its lowzf 94c56mj ik8j4o fq5vj ,zvler 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 energy.] $m/s$
Post time 2025-2-18 20:00:22
