[填空题]
A 2.30-m-long pole is 9bnpkhao3+ kc3e-18 p u5us zrbalanc x,(m3me,rv6bvnhm z yhv-q*j0 hy0 d9ed vertically on its tip. It starts to fall and its lower end does not slip. What will be the spee y0nmz0yr6vh-d9q3 v mhx ,vb (hj,*med 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
