游泳是一种在水中前进的运动。人在水中借助于水的浮力克服身体的重力,而浮在水面,用肢体向后划水和打水,产生反作用力,推动身体前进。这里就釆談談这些力。浮力当我們身体浸在水中的时候,会感到有一个支撑着不使我們下沉的力。这个向上的力就是浮力。 Swimming is a sport that advances in water. People in the water use the buoyancy of water to overcome the body’s gravity, and float on the water, using the body to draw water backwards and draw water, creating a reaction force and pushing the body forward. Here we talk about these forces. Buoyancy When our bodies are immersed in water, we feel that there is a force that holds us down. This upward force is buoyancy.