Fluids exert pressure on a person due to their weight and movement. The deeper a person is submerged in a fluid, the greater the pressure they will experience. This is because the weight of the fluid above them creates a force that is transmitted to the person's body.
The pressure on a person increases with depth in a fluid. This is because the weight of the fluid above them increases, leading to a greater force being exerted on their body. This is known as hydrostatic pressure, and it increases proportionally with depth.
The pressure a person experiences in a fluid is affected by the density of the fluid, the depth at which they are submerged, and the acceleration due to gravity. Additionally, the surface area of the person's body and the shape of their body can also impact the pressure they experience.
The shape of an object can greatly affect the pressure it experiences in a fluid. For example, a pointed object will experience less pressure than a flat object due to its smaller surface area. This is why sharp objects like needles can easily pierce through skin.
Buoyancy is the upward force exerted by a fluid on an object that is immersed in it. The amount of buoyancy force is equal to the weight of the fluid that the object displaces. This is why objects with greater density than the fluid will sink, while objects with lower density will float. The pressure on a person's body in a fluid is affected by the buoyant force acting on them, which can make them feel lighter or heavier depending on the density of the fluid and their own body density.