Buoyancy is the force exerted by a liquid or fluid that opposes and object's weight.
Buoyancy is the upward force that acts on the swimmer while they are in the water. The pressure from beneath the swimmer is much greater than the pressure above them – allowing for the swimmer to float. At the surface of the pool, there is less resistance as the fluid is more resistant than air. It is of a greater advantage to be more buoyant and stay closer to the surface. In order for an object to float, its buoyant force needs to be greater or equal to the weight of the water.
To become more buoyant, swimmers use their upper body since it is the body;s centre of buoyancy due to the greater surface area. The upper body needs to be used effectively and efficiently as the lower body would sink and not be streamlined (eddy resistance) – the swimmer needs to be parallel to the surface. In order to do this, the chest is pressed down and causes the hips to rise. Water is substantially denser than air (773x) and this causes the swimmers to float. The higher the swimmer is in the water, the less water they are swimming through and the fast they will be able to go – relating back to all the friction forces in swimming.
Buoyancy is the upward force that acts on the swimmer while they are in the water. The pressure from beneath the swimmer is much greater than the pressure above them – allowing for the swimmer to float. At the surface of the pool, there is less resistance as the fluid is more resistant than air. It is of a greater advantage to be more buoyant and stay closer to the surface. In order for an object to float, its buoyant force needs to be greater or equal to the weight of the water.
To become more buoyant, swimmers use their upper body since it is the body;s centre of buoyancy due to the greater surface area. The upper body needs to be used effectively and efficiently as the lower body would sink and not be streamlined (eddy resistance) – the swimmer needs to be parallel to the surface. In order to do this, the chest is pressed down and causes the hips to rise. Water is substantially denser than air (773x) and this causes the swimmers to float. The higher the swimmer is in the water, the less water they are swimming through and the fast they will be able to go – relating back to all the friction forces in swimming.