[填空题]
A 2.30-m-long pole is balanced vertick1k5 /cuk5 u/y 8)wt)0uqlgvu9 (zodtp(xbtwally on its tip. It starts)qp7(c ;oi)h+h tut jh to fall and its lower end ;tuci qt(7)hh oj) +hpdoes 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
