[填空题]
A 2.30-m-long pole ib jbqc5+kz,pj;/3.ucf6xw m b s 9sk62 wqmvy/w balanced vertically on its tip. It starts to fall and its lower end does not slip. What will be the w9q yk s/6vm2wspeed 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
