[填空题]
A 2.30-m-long pole is balanced verticezf374y 6 ci7x5wj3r*cz recaally on its tip.k.ig s /mjvlpq66a ,8,dc4ooz 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 thgov 6,kz.il6,s48cma /j dqpoe ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
