[填空题]
A 2.30-m-long pole is 7d h hrjqgr/k2y fk04+balanced v2+ vyfoxk .w6w1kinz7ertically on its tip. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole justn1 v+wxkfw2o7z. iy6 k before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
