[填空题]
A 2.30-m-long pole iktjs*0i n0-pgs balanced vertically on its tip.xr1o j m: (7q1nr1rpfn 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.] 1oj mrxn7(p1qr f n1r: $m/s$
Post time 2025-2-18 20:00:22
