[填空题]
A 2.30-m-long pole is balanced u5k fnvg19 )wcv6 zlm3v0wumjl590x* bmed gm6ertically 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 just before it hits the ground? [Hint: Usexlm medg b5j6m0wu*09 conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
