Sinking Can Boat: Debating the Rate of Water Flow

[tosse]

Assume you have a can (representing a boat) with a hole in the bottom floating in a tank filled with water. The "boat" will start to sink.

Now to my question..
My teacher told me that the speed of which water is runnig through the hole of the can is constant. But i can't seem to understand that, since (i think) the speed depends on the pressure which constantly increases as the boat is sinking - wouldn't that mean the speed increases aswell!??

 

[tiny-tim]

Welcome to PF!

Hi tosse! Welcome to PF!

Couldn't you argue that the more water in the boat, the less is the difference in pressure?

Test it by calculating what the pressure is if you put a plug in (to keep the boat afloat) when the water inside the boat is height h above the bottom