[填空题]
A 2.30-m-long pole is balan.oq /q1ar0 ehj v(gem,e y6pa/ced vertically on its tiuior 58mx4 6vyp. It starts to fall and its lower e854moyur6 ivxnd 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.] $m/s$
Post time 2025-2-18 20:00:22
