PHYS 101 Chapter 3 homework

PHYS 101 Chapter 3 homework - energy is simply lost [1]....

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10/2/07 PHYS 101-02 Why is the law of “Conservation of Energy” so important in physics and to society? To understand the importance of the law of Conservation of Energy, this law must first be defined – “In the absence of an external force, the momentum of a system remains unchanged.” One of the most common examples in physics and for society comes in the form of collisions. Using the Conservation of Energy law, many things can be determined about occurrences such as automobile accidents distances traveled when two objects collide. Though important, this concept has great meaning beyond these examples concerning types of elastic and inelastic collisions. Another key fact that the definition also implies is that the energy in the system cannot be destroyed. This energy can change form, but never be lost. One good example of this is in a car. In a car, not all energy is converted into momentum; however, this does not mean that the remaining
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Unformatted text preview: energy is simply lost [1]. The remaining energy is, for the most part, changed into heat. While this doesnt help the movement of the car, it is still in fact a different usage of the energy. The law of Conservation of Energy is so important because it can be applied to so many parts of physics and all science in general. Electricity, more specifically an electrical current, is another good example. As stated in the Junction Theorem, all currents into a circuit must equal the amount of currents leaving the circuit; no electrical energy is created or destroyed [2]. To specify a general conclusion, it is the universal applicability of the law of Conservation of Energy that makes it so important in physics and to society. References: [1] http://tomclegg.net/conservation [2] http://www.britannica.com/eb/article-9045598/Kirchhoffs-circuit-rules#95092.hook...
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PHYS 101 Chapter 3 homework - energy is simply lost [1]....

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