[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It starts tohty 5s3r iozq 6rcq70l.6o/bf fall zo;1a v50.f nr ptpxnse60wfsp73ab* and its lower 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.]wfx; 3espft.6 p az1ans5vn 7*0oprb0 $m/s$
Post time 2025-2-18 20:00:22
