[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It sta:1rvbt8e3 yx7 sa e6zprts to favvybefe317dmcs)v7r xw(k 6* ll and its lower end does not sli 3e*(sbycvrv d k6w1vxf7e7m)p. What will be the speed 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
