[填空题]
A 2.30-m-long pole is bafg * jrxm)k*8flanced vertically(xym qjiglf:*y; w 2j3 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: Use conservawy ; jgqy3i*fj:l2(mx tion of energy.] $m/s$
Post time 2025-2-18 20:00:22
