[填空题]
A 2.30-m-long pole is balanced vertxl)0dr g2g6ipu-os+p.w1oh u ically on its tip. It starts to falsash7z0oim4 6l 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 c 0 7i4sasm6hzoonservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
