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Introduction to Kinetic energy theory : Kinetic energy theory deals with the energy that is possessed by the body by the virtue of its motion. Kinetic energy is measured by amount of work that a body can do against the opposing force that is acting on it before coming to the rest position. This theory is a simple theory like some good models in physics, it has an enormous predicting power. It is very effective in predicting the behavior of the matter that it is accepted as an absolute truth. All the matter present is made of particles. There exists some forces between the particles and the forces that hold these particles together in solids as well as in liquids. The higher is the temperature of the material, the more is its internal energy and more energy its particles also have. In solids,the particles vibrate vigorously where as in liquids and gases the particles moves faster. The kinetic theory of gases describes a gas as a large number of small particles (atoms or molecules), all of which are in constant, random motion. The rapidly moving particles constantly collide with each other and with the walls of the container. Kinetic theory explains macroscopic properties of gases, such as pressure, temperature, or volume, by considering their molecular composition and motion. Essentially, the theory posits that pressure is due not to static repulsion between molecules, as was Isaac Newton's conjecture, but due to collisions between molecules moving at different velocities through Brownian motion. Kinetic Energy Theory in a Group of Particles In a group of particles the kinetic energy theory is involved in a solid that consists of billions of particles. The articles constantly transfers energy between themselves. So the total internal energy of a solid is sum of all kinetic energies and potential energies of all those particles. At a given time, we can not say whether the energy is mainly due to kinetic energy or potential energy. We also cannot say which particles can have more energy. The total internal energy of the solid is randomly distributed between the Kinetic Energy and Potential energy and also it is randomly shared among all those particles. Some examples of Kinetic energy theory: 1) A vehicle which is in motion. 2) Flowing water in the river. 3) A bullet that is fired from the gun. 4) A satellite that is moving around earth. Expression for Kinetic Energy As the body have an uniform acceleration, the displacement will be in the direction of the force applied by it. The Work done by the body against the opposing force that is acting on it is Work done by the body = Force applied by the body `xx` displacement of the body = `((mv^2)/(2s)) xx s` . i.e., work done by the body = `1/2mv^2` . which is equal to the kinetic energy of the body. ? Kinetic energy of the body `K = 1/2 mv^2` . Learn more on about Niels Bohr Atomic Theory and its Examples. Between, if you have problem on these topics Electron Shells, Please share your comments.
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