[填空题]
A 2.30-m-long pole is bah c 7-psbg;fwsx:,b1fp ;s) wwlanced vertically on its tip. It starts to fall and its pw) bs1 px:sfbg7w ,-;ws;hf c. jcutocn7 d 0e67j +2fht+fvf e14vmqlower end does f2vm47 t 60.ccodj vhej+qu7f+ef 1nt not slip. 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
