Find angular velocity of rod, if block moves with veocity v

CONSTRAINT MOTION MECHANICS PHYSICS PROBLEM FOR IIT JEE ADVANCED AND JEE MAIN AND NEET
A block of height h moves with a constant velocity v0 on a horizontal table. A rod is pivoted at one end fixed to a hinge on the table and other end rests on the block as shown. Find the angular velocity of the rod, when it makes angle θ with the horizontal.

[@BharatMeenaiitk]

What an explanation professor Kabhi!!

[@GVedishwar]

superb explanation