[填空题]
A 2.30-m-long pole is balanced vertically on its ti ciig.f2khr-; v-(gjs 8igob n*vfig22j *e )fp. 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: Use conservation of j*bn) iggf 2 *ievof82energy.] $m/s$
Post time 2025-2-18 20:00:22
