[填空题]
A 2.30-m-long pole is b:hf4k+ov(pi* ppqz7b a7q9xte5ir( palan2bbol-m ,c,ct3w r g8aced vertically on its tip. It starts to fall and its lmcb,-gc 8ao,bw lt23rower 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
