[填空题]
A 2.30-m-long pole is balanced verticallsw.rx uic,qzm.5rrrq) /f- j7 y on its tip. It stlay olh;cnm3 (e 0s8z6arts to fall and its lower end does not slip. What will be sah 0 ;(lm3oe86zlncythe 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
