[填空题]
A 2.30-m-long pole is balancbioa)7( cxzwb2pqy6 :ed vertic tqk1d qbp3env7 p)o/(ally on its tip. It starts to fall and its lowepko pv1 qn dqb)7(e/t3r 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.] $m/s$
Post time 2025-2-18 20:00:22
