Principle of Buoyancy used in swimming is established by :

Question

Accepted Answer

The principle of buoyancy, which is crucial in swimming, is established by Archimedes, making Option 4 the correct answer. Archimedes, a Greek mathematician, physicist, and engineer, formulated the principle of buoyancy, also known as Archimedes' Principle. This principle states that any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object. This principle explains why objects float or sink in water and is fundamental to understanding how swimmers can stay afloat and move through water.

Now, let's explain why the other options are incorrect:

1. **Isaac Newton**: While Newton made significant contributions to physics, particularly with his laws of motion and universal gravitation, he did not establish the principle of buoyancy. His work primarily focused on the forces of gravity and motion, which are different from the concept of buoyancy.

2. **Leonardo da Vinci**: Leonardo da Vinci was a polymath who made numerous contributions to art, science, and engineering. Although he studied fluid dynamics and made observations about water, he did not formulate the principle of buoyancy. His work was more observational and artistic rather than establishing scientific principles like buoyancy.

3. **Aristotle**: Aristotle was a Greek philosopher who made early contributions to many fields of knowledge, including physics. However, his understanding of physics was more qualitative and philosophical. He did not develop the principle of buoyancy; his ideas were more focused on natural philosophy rather than the precise scientific principles established by Archimedes.

In conclusion, Archimedes is the correct answer because he specifically formulated the principle of buoyancy, which is essential for understanding swimming dynamics. The other options, while representing influential figures in science and philosophy, did not establish this particular principle.