Essay on Swimming Techniques and Physics
Presently scientist are conducting research to help people gain new techniques in swimming. While scientists continue research for new swimming techniques, they must start with early techniques of swimming as a sport and part of life. Learning how to swim is not easy. However, swimming is physics. There are laws, buoyancy, drags, and motions. To become a good swimmer one should take initiative to learn how certain techniques evolved and take an active approach into applying these physics into their own strokes. This report will state a brief summary of the physics of swimming and its mechanics and then continue by describing the technique of the freestyle and backstrokes.
A beginner swimmer must …show more content…
Form drag is resistance to the shape of an object and its profile to the water. For example, narrow water skis would pass through water more efficiently than a wider water ski. The narrow water ski pushes less water aside than the wider skis. Second example to reduce drag is the streamlined position. To feel the difference, push off from the wall of the pool and try gliding in various positions: streamlined, with your arms out to the sides, and with your knees flexed. As you increase the surface area the water must pass around, you increase from drag and cannot glide as far. Wave drag is resistance caused by water turbulence. Wave drag also occurs during speed of the swimmer. The faster the swimmer swims the faster the wave drag occurs in the pool. A swimmer can reduce wave drag by smooth process of strokes but one must not use splashing arm entries to reduce wave drag. On the other hand, swimmers can create wave drag; thus, lane lines have been created to reduce drag. A frictional drag is the resistance caused by the surface texture of the body as it moves through the water. For example, to reduce frictional drag competitive swimmers shave their body hairs to reduce frictional drag. This method is thought to increase the speed of swimmers and reduce frictional drag.
Lift is a force produced perpendicular to the flow of a fluid. It is predicted by Bernoulli's equation for