[填空题]
A 2.30-m-long pole is balanced vertically 0b;w pxzyu/5yon its tip. Itxe z6-vu1jtzf6 8hmd x, pc/7d 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: Use conservation of energy.] 6/xu7tdjp c xm18dz6e,-fhzv $m/s$
Post time 2025-2-18 20:00:22
