[填空题]
A 2.30-m-long pole is balanced vertically on its tip. It startsctkq7/ns z c6c9dn u(:ueq74 *dsc oc76x6x(i k x.nn/7iedlyto fall and its lower enlickcd uod.4 sq 6xe7ni( 7e/6yn*x 7xd 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
