[填空题]
A 2.30-m-long pole is balancn9;prx cv.t-g ed verticall4drp*8w:vnebnofs+ atq 1a85 y on its tip. It starts to fall and its lower end does not slip. What will be the speed offpose +a 85tq:w4bdn 81v nra* 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
