[填空题]
A 2.30-m-long pole is balanced vertically on8s ed ng;cg.szoa,3 fr1y7 cz- its tip. It 9)9xl-i in(7d-td/kef smmorm7 do3estarts to fall and its lower end doene)i7im - -odddmo/79(9f3 rxetsk mls 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
