[填空题]
A 2.30-m-long pole is balanced verticgw oz3h*+30l slr pi3fally on its o30gpf omd/iy 1wx;f7l n7.n rtip. 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 it hits the ground? [Hint: Use conservation of energy.d7xm r o;fo3.n7 1/lnpfwgyi0] $m/s$
Post time 2025-2-18 20:00:22
