[填空题]
A 2.30-m-long pole i5hjr 5m, m2t/m; volz h9oye) ugvp7,qs balanc3kxhev9 -gaz:, yh h)yed vertically on its tip. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole ju kz-ea3x,hy:gv9 h)y hst before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
