[填空题]
A 2.30-m-long pole is balanced vertically oc5 vc r6pccu+/n its tip. It startse8p2nc 5+ujlog zsk 3xqq 0/,i to fall and its lower end does not slip. W2n xp,3q cq+ike/joz l850 sguhat 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
