I've been wondering about how sunken objects would behave if you could instantaneously flip their container with water. Like if you had a bucket filled with normal tap water and you dropped a ball in it. Then SOMEHOW you instantly flip the bucket over such that for just a moment, the water is suspended in midair and the ball is still touching the base of the bucket.
What I want to know is, first of all what would happen? I know that if you drop a bowling ball and a bouncy ball from the same height they'd just about reach the ground at the same time, but what about this scenario? If you "drop" water and an object inside the water at the same height, do they reach the ground simultaneously? Or does the object "float" down the falling water?
Second of all, under what conditions could the object fall first? That's what I'm looking for- what kind of object could fall out of the water and reach the ground before the water does? What difference would there be between the object being a sunken wooden ship and a rock?
Third of all, say we take this experiment to the ocean, where the water pressure gets higher as you go down. If there's an object at the bottom of the ocean and we flip the ocean, how does the pressure affect things?