I would like to add on to this information.
If you buy a boat that has a V bottom it will rock around in the water more but it will not wear you out as fast as a flat bottom boat if there is any chop.
Every little movement of the water will be felt in a flat bottom boat.
A V bottom boat when getting some water in it, becomes more stable because the water collects in the middle of the V bottom.
It a flat bottom boat if water gets in it, the water will want to go to one side or the other of the boat from movement of people in the boat or the waves., and can become more unstable.
About stability.
The higher the sides the more reserve stability the boat has.
A flat bottom boat has high initial stability but not as much reserve stability.
