[填空题]
A 2.30-m-long pole is;- -ft9u mm2os6d/qmju7ayxauxbpxu ;u .g; v1ubh s2uj4-a+.cyma* balanced vertically on its tip. It starts to fall and its lower end does notb-u ;1p2asuju x4.gxb+uyh *mu;.cva slip. What will be the speed of the upper end of the pole just before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
