[填空题]
A 2.30-m-long pole is balio9 f23ng3nki m flof9q5 )ud,6zkjn+anced vertically oz,lzrvtj1 ilz7c 48 m/n its tip. It starts to fall and its lower end does not/1zr,4jlc78i ztzl v m 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
