[填空题]
A 2.30-m-long pole is balanced verticahzk ;dmow64)c2/kdzy e) lyr):cn k(slly wn f;c )f6nkg6z*(pq ;no3l+ cr5hkbs 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 pole just before it hits the ground? [Hint: Use conse ;cg (kq 3sfnfo6*n+wcp)rbz6nlkh;5 rvation of energy.] $m/s$
Post time 2025-2-18 20:00:22
