[填空题]
A 2.30-m-long pole is balanced verticallq*z xs*j: p8auya pmj7) ag.2yy f0 /qrlw8 7x. e4s lo(b8yjubvon 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 ( y40.fb8 lrq/b87sjx vloeuwthe ground? [Hint: Use conservation of energy.] $m/s$
Post time 2025-2-18 20:00:22
