[填空题]
A 2.30-m-long pole is balanced vertically bbt, n q+1 b-m0xepz:xp isg,2on tbi3one b2m( 9mfu +(zits tip. It starts to fall 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: ment3(+ bzib9m ou(2fUse conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
