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The laws of nature cover a wide variety of subjects, such as the conservation of energy, momentum and angular momentum. Important equations such as Maxwell's law and Coulomb's law can be easily derived from these laws. The following notes take you through these derivations in detail. Physics Derivations For Class 11 Pdf 3844: https://class11physicsnotes.blogspot.com/p/physics-notes-for-class-11th-pdf. html Physics is the study of the nature of matter and energy at its most basic level. A physics professor in any subject will use different laws to show how they relate to each other. The laws used are called physical laws. Each law can be derived from the previous law. This way, an entire field of physics can be derived from a single introductory physics lesson. A simple demonstration of this approach is provided in Fig 1-1 , which shows an introduction course on kinetic energy, which is shown below: At the top level, there are five laws that are used throughout this section: Laws of Motion & Force The most important one being the Law of Conservation of Momentum . This law states that the total momentum of a closed system should remain constant. This includes energy as well as momentum. Conservation of Momentum is an extension to Newton's third law - "When one body exerts a force on a second body, the second body exerts an equal and opposite force on the first." Conservation of Momentum is essentially the same, but not only applies to two objects, but also to objects within any closed system. It states that no matter how hard you hit your sibling or other objects, they will never send back more energy than what they received initially. Furthermore, if you are trying to measure the total momentum of two objects, then you must consider the initial momentum that they had before the collision. Momentum is mass times velocity. If you had two equal masses having different velocities, surely it would make sense to choose the one with higher velocity? Not quite. The reason for this is that while two objects of different masses will have different velocities after hitting each other, their momentums will still be equal. Momentum is constant. Also, if you are measuring the total momentum of a system with multiple masses, then all masses are added together before calculating total momentum. This brings us to our next law - Newton's Second Law . Newton's Second Law states that the change in momentum of a system is equal to an applied force which causes that change. In certain situations, it is possible to better understand this law by discussing the basics of forces. In Fig1-2 , we have a simple example of Newton's second law. A force is pulling a mass at a certain velocity, and opposite force would also cause a mass to move with a certain velocity. Such forces are called normal forces because they always point in the direction you'd expect them to point – towards the center of their target. cfa1e77820
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