Swimming Freestyle: Propulsion Force & Drag Resistance

[elixirnova]

Recently I have gained great interst on understanding how I gain speed and move through water while swimming in a race. Using the Freestyle as example I have my body in the water creating drag forces or a form of friction. And I must use my hands and feet(mostly hands/arms) to create surface area to apply force backwards on the water so that it will increase my forward velocity.

When this Push occurs is there any possible way to put numbers on these variables(drag force-on surface and under water, propulsion force-with the surface area and speed and pressure occurring on the pushing surface)

If anything an equation that I could use to calculate a general estimate of the resistance I receive on the surface of the water compared to the parts of my body the are completely submerged that create drag forces. Any helps?

 

[GENIERE]

Try this link.

http://www.coachesinfo.com/category/swimming/153/#hydro

 

[charng]

Hello there,

I can definitely understand your interest in understanding the forces involved in swimming freestyle. The propulsion force and drag resistance are two very important factors that determine your speed and movement in the water.

To answer your question, there are indeed equations that can help estimate the drag force and propulsion force in swimming. The drag force is dependent on several factors, such as the surface area of your body in contact with the water, the speed at which you are swimming, and the density and viscosity of the water. One of the most commonly used equations to estimate drag force is the drag equation, which is Fd= 1/2 * ρ * V^2 * Cd * A, where Fd is the drag force, ρ is the density of water, V is the velocity, Cd is the drag coefficient, and A is the surface area.

On the other hand, the propulsion force is generated by your hands and feet as they push against the water. This force is also dependent on the speed at which you are swimming and the surface area of your hands and feet. One way to estimate this force is by using the Bernoulli's principle, which states that an increase in the speed of a fluid results in a decrease in pressure. So as you push against the water, the pressure behind your hands and feet decreases, creating a forward force.

However, it is important to note that these equations provide a general estimate and may not be completely accurate for each individual swimmer, as there are many other factors that can affect propulsion and drag, such as body shape, technique, and water conditions.

I hope this helps answer your question and gives you a better understanding of the forces involved in swimming freestyle. Keep exploring and learning, and good luck with your swimming races!