[填空题]
A 2.30-m-long pole is balanced ver*l p q)n0kuf7 *gxi7lmtical pm zda+d+6ujn.k n35fly 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 pd fu+a. +pm3nz k6jn5dole just before it hits the ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
