[填空题]
A 2.30-m-long pole is/fu;* ckkyxtn 3w)+ ul bala,c qr 9w*wkxe/f-jmtd bx9syu7k7y* 4 nced 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 just before i*r97x97jq uk/fs- k y t mc4ywdeb*w,xt hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
