[填空题]
A 2.30-m-long pole is b 5o ()m; oewo5yq.grjbalanced vertically on its tip. It starts to 080rpedg kl,irykn6 v2m, (jdfall 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 conservatiog0kl,pk68 er d2 rm n,ijyvd(0n of energy.] $m/s$
Post time 2025-2-18 20:00:22
