[填空题]
A 2.30-m-long pole is balanced veu)pld dkx*8d( r sxw3ok t3e;j6tically 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 pe x6k3;owstj3 ole just before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
