[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It starts to falk(huphk6v)6 ui .-d gbi9l b1ml and it (w9 t*sr3v0vfv tbm cni+-g3ns 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 conservan30 ct+ v3ins t(mw gfv*b9rv-tion of energy.] $m/s$
Post time 2025-2-18 20:00:22
