🔥🔥🔥 Calculus In Physics

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Calculus In Physics

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Calculus -- The foundation of modern science

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Analytics cookies Analytical cookies help us improve our website. As an Amazon Associate we earn from qualifying purchases. Want to cite, share, or modify this book? This book is Creative Commons Attribution License 4. Skip to Content Go to accessibility page. University Physics Volume 1 Introduction. My highlights. Table of contents. This defines the derivative function of the squaring function or just the derivative of the squaring function for short. A computation similar to the one above shows that the derivative of the squaring function is the doubling function.

Leibniz, however, did intend it to represent the quotient of two infinitesimally small numbers, dy being the infinitesimally small change in y caused by an infinitesimally small change dx applied to x. For example:. In this usage, the dx in the denominator is read as "with respect to x ". Another example of correct notation could be:. Even when calculus is developed using limits rather than infinitesimals, it is common to manipulate symbols like dx and dy as if they were real numbers; although it is possible to avoid such manipulations, they are sometimes notationally convenient in expressing operations such as the total derivative. Integral calculus is the study of the definitions, properties, and applications of two related concepts, the indefinite integral and the definite integral.

The process of finding the value of an integral is called integration. In technical language, integral calculus studies two related linear operators. The indefinite integral , also known as the antiderivative , is the inverse operation to the derivative. F is an indefinite integral of f when f is a derivative of F. This use of lower- and upper-case letters for a function and its indefinite integral is common in calculus. The definite integral inputs a function and outputs a number, which gives the algebraic sum of areas between the graph of the input and the x-axis. The technical definition of the definite integral involves the limit of a sum of areas of rectangles, called a Riemann sum.

If the speed is constant, only multiplication is needed, but if the speed changes, a more powerful method of finding the distance is necessary. One such method is to approximate the distance traveled by breaking up the time into many short intervals of time, then multiplying the time elapsed in each interval by one of the speeds in that interval, and then taking the sum a Riemann sum of the approximate distance traveled in each interval. The basic idea is that if only a short time elapses, then the speed will stay more or less the same. However, a Riemann sum only gives an approximation of the distance traveled. We must take the limit of all such Riemann sums to find the exact distance traveled.

When velocity is constant, the total distance traveled over the given time interval can be computed by multiplying velocity and time. For example, travelling a steady 50 mph for 3 hours results in a total distance of miles. In the diagram on the left, when constant velocity and time are graphed, these two values form a rectangle with height equal to the velocity and width equal to the time elapsed. Therefore, the product of velocity and time also calculates the rectangular area under the constant velocity curve.

This connection between the area under a curve and distance traveled can be extended to any irregularly shaped region exhibiting a fluctuating velocity over a given time period. If f x in the diagram on the right represents speed as it varies over time, the distance traveled between the times represented by a and b is the area of the shaded region s. For each small segment, we can choose one value of the function f x.

Call that value h. The sum of all such rectangles gives an approximation of the area between the axis and the curve, which is an approximation of the total distance traveled. The definite integral is written as:. In a formulation of the calculus based on limits, the notation. Formally, the differential indicates the variable over which the function is integrated and serves as a closing bracket for the integration operator.

Functions differing by only a constant have the same derivative, and it can be shown that the antiderivative of a given function is actually a family of functions differing only by a constant. The unspecified constant C present in the indefinite integral or antiderivative is known as the constant of integration. The fundamental theorem of calculus states that differentiation and integration are inverse operations. More precisely, it relates the values of antiderivatives to definite integrals. Because it is usually easier to compute an antiderivative than to apply the definition of a definite integral, the fundamental theorem of calculus provides a practical way of computing definite integrals. It can also be interpreted as a precise statement of the fact that differentiation is the inverse of integration.

The fundamental theorem of calculus states: If a function f is continuous on the interval [ a , b ] and if F is a function whose derivative is f on the interval a , b , then. Furthermore, for every x in the interval a , b ,. This realization, made by both Newton and Leibniz , who based their results on earlier work by Isaac Barrow , was key to the proliferation of analytic results after their work became known. The fundamental theorem provides an algebraic method of computing many definite integrals—without performing limit processes—by finding formulas for antiderivatives.

It is also a prototype solution of a differential equation. Differential equations relate an unknown function to its derivatives, and are ubiquitous in the sciences. Calculus is used in every branch of the physical sciences, actuarial science , computer science , statistics , engineering , economics , business , medicine , demography , and in other fields wherever a problem can be mathematically modeled and an optimal solution is desired. It allows one to go from non-constant rates of change to the total change or vice versa, and many times in studying a problem we know one and are trying to find the other. Physics makes particular use of calculus; all concepts in classical mechanics and electromagnetism are related through calculus.

The mass of an object of known density , the moment of inertia of objects, as well as the total energy of an object within a conservative field can be found by the use of calculus. An example of the use of calculus in mechanics is Newton's second law of motion : historically stated it expressly uses the term "change of motion" which implies the derivative saying The change of momentum of a body is equal to the resultant force acting on the body and is in the same direction.

Starting from knowing how an object is accelerating, we use calculus to derive its path. Maxwell's theory of electromagnetism and Einstein 's theory of general relativity are also expressed in the language of differential calculus. Chemistry also uses calculus in determining reaction rates and radioactive decay. In biology, population dynamics starts with reproduction and death rates to model population changes. Calculus can be used in conjunction with other mathematical disciplines. For example, it can be used with linear algebra to find the "best fit" linear approximation for a set of points in a domain. Or it can be used in probability theory to determine the probability of a continuous random variable from an assumed density function. In analytic geometry , the study of graphs of functions, calculus is used to find high points and low points maxima and minima , slope, concavity and inflection points.

Green's Theorem , which gives the relationship between a line integral around a simple closed curve C and a double integral over the plane region D bounded by C, is applied in an instrument known as a planimeter , which is used to calculate the area of a flat surface on a drawing. For example, it can be used to calculate the amount of area taken up by an irregularly shaped flower bed or swimming pool when designing the layout of a piece of property. Discrete Green's Theorem , which gives the relationship between a double integral of a function around a simple closed rectangular curve C and a linear combination of the antiderivative's values at corner points along the edge of the curve, allows fast calculation of sums of values in rectangular domains.

For example, it can be used to efficiently calculate sums of rectangular domains in images, in order to rapidly extract features and detect object; another algorithm that could be used is the summed area table. In the realm of medicine, calculus can be used to find the optimal branching angle of a blood vessel so as to maximize flow. From the decay laws for a particular drug's elimination from the body, it is used to derive dosing laws. In nuclear medicine, it is used to build models of radiation transport in targeted tumor therapies. In economics, calculus allows for the determination of maximal profit by providing a way to easily calculate both marginal cost and marginal revenue. Calculus is also used to find approximate solutions to equations; in practice it is the standard way to solve differential equations and do root finding in most applications.

Examples are methods such as Newton's method , fixed point iteration , and linear approximation. For instance, spacecraft use a variation of the Euler method to approximate curved courses within zero gravity environments. Meanwhile, calculations with infinitesimals persisted and often led to correct results. This led Abraham Robinson to investigate if it were possible to develop a number system with infinitesimal quantities over which the theorems of calculus were still valid. The theory of non-standard analysis is rich enough to be applied in many branches of mathematics. As such, books and articles dedicated solely to the traditional theorems of calculus often go by the title non-standard calculus.

This is another reformulation of the calculus in terms of infinitesimals. Based on the ideas of F. Lawvere and employing the methods of category theory , it views all functions as being continuous and incapable of being expressed in terms of discrete entities. One aspect of this formulation is that the law of excluded middle does not hold in this formulation.

Constructive mathematics is a branch of mathematics that insists that proofs of the existence of a number, function, or other mathematical object should give a construction of the object. As such constructive mathematics also rejects the law of excluded middle. Reformulations of calculus in a constructive framework are generally part of the subject of constructive analysis. From Wikipedia, the free encyclopedia. This article is about the branch of mathematics.

For other uses, see Calculus disambiguation. Branch of mathematics. Limits of functions Continuity. Mean value theorem Rolle's theorem. Lists of integrals Integral transform Definitions Antiderivative Integral improper Riemann integral Lebesgue integration Contour integration Integral of inverse functions Integration by Parts Discs Cylindrical shells Substitution trigonometric , Weierstrass , Euler Euler's formula Partial fractions Changing order Reduction formulae Differentiating under the integral sign Risch algorithm. Fractional Malliavin Stochastic Variations. Main article: History of calculus. Main articles: Limit of a function and Infinitesimal. Main article: Differential calculus. Main article: Leibniz's notation.

Main article: Integral. Main article: Fundamental theorem of calculus. Main article: Non-standard calculus. Main article: Smooth infinitesimal analysis. Main article: Constructive analysis. Main article: Outline of calculus. Foundations of the Calculus. Philadelphia: Saunders. OCLC The History of the Calculus and its Conceptual Development. New York: Dover.

New York: Thunder's Mouth Press. ISBN Boston: McGraw Hill. ISBN X. Skeptics Stack Exchange. Retrieved 29 March

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