When a person is completely submerged in water and is sinking, the buoyant force felt by the person is less than gravity and has little to do with the depth of the water.
First of all, the formula for calculating buoyancy is: F float = ρ discharge gV liquid
In detail, the buoyancy force experienced by a person = density of l 'water X acceleration of gravity g Since the depth of water can submerge the entire human body, the depth of water and the depth of water are related to the size of the buoyancy force. It doesn't matter anymore.
Second, when a person is completely submerged in water, the relationship between the buoyant force on the person and gravity is:
(1) When the force of buoyancyIf exerted on the person is greater than gravity, the person floats in the water. Eventually, floating on water, the person's gravity equals the buoyant force.
(2) When the buoyant force on a person is equal to gravity, the person is suspended in water and maintains a relatively stationary state.
(3) When the buoyant force on a person is less than gravity, they sink to the bottom of the water.
The vehicles are different. Some vehicles have a greater fording depth, while others have a smaller fording depth. Some may stall if water penetrates 0.5 meters, and others may not stall if water penetrates 1.5 meters.
Fording depth is one of the important indicators for assessing the off-road passability of a car. It refers to the deepest water a car can cross, and it is also asafe depth.
For example: the Hummer H2 can safely drive in 1.5 meters of water at a speed of 60 kilometers per hour