[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It starts to fcd/bxw5i iul,; gm;w7 all and llb3e17 ruumu /qyj)3 its lower end does not slip. What will be the speed of thl3 1bm3 jl/ qureu7u)ye 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
