[填空题]
A 2.30-m-long pole is balanced vmhfy .6 9y5nopertically on its tip. It starts t 4n l9xaeod)m g;usu-/o 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: Use conmxad/9u- lguoens 4; )servation of energy.] $m/s$
Post time 2025-2-18 20:00:22
