[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It starts to fallfnz:hzgha:) wi 1e*j. ho5v4l /n(;bw)+t,cm ca.b1nb nbwr eand its lower end does not slip. What will be the speed of twm.e1rc;a+n (c)nw bbbn, b /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
