[填空题]
A 2.30-m-long pole is bae nsgsva2t6t/xn q;*-chk .r( lu(t .w- bxrc04c)ws0 mms1nxhyy9hl )anced 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 bem9yxw)h 0yn hu(4ts0 m1- .wlcxbrc)sfore it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
