[填空题]
A 2.30-m-long pole is balanced vertically on its tip(,;h6tjw8fj)zo/d p j px6zyaj 7rrh. *grnwottqlq: * g1oq( 0rf-.r. It starts to fall and its lowgq0 rrt -* r.*1goflo:nq(qwt er end does 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
