TAILIEUCHUNG - Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 90

Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 90. A major complaint of professors teaching calculus is that students don't have the appropriate background to work through the calculus course successfully. This text is targeted directly at this underprepared audience. This is a single-variable (2-semester) calculus text that incorporates a conceptual re-introduction to key precalculus ideas throughout the exposition as appropriate. This is the ideal resource for those schools dealing with poorly prepared students or for schools introducing a slower paced, integrated precalculus/calculus course | Arc Length Work and Fluid Pressure Additional Applications of the Definite Integral 871 amoUnt of w rk to weight of ith slice distance to the top lift up the i th slice The volume of the i th slice n 4 2 Ax 16nAx m3. The density of water is 1000 kg m3. Therefore the mass of the ith slice 1000 16nAx kg. We calculate the weight of the slice by multiplying by g m sec2. The weight of the ith slice 1000 16nAx newtons 156 800nAx newtons amt. of work to lift up the i th slice 156 800nAx xi n y total work lim 156 800n x -Ax n v 1 156 800nx dx x total work 156 800n 2 15 156 800n - 175 616n The work done is 175 616n joules or 551 joules. b To reduce the water level to m to pump half the water out requires partitioning the interval into n equal pieces because the water slices must move between and m. Figure f 156 800nx dx 156 800n x 2 156 800n - 49 392n joules or 155 joules Notice that it takes substantially less work to reduce the water depth from m to m than it does to reduce it from m to 0 m. Fluid Pressure and Force Water is an invaluable resource of the earth and civilizations have devoted much scientific energy toward understanding it. We build bridges to travel over it tunnels to travel under it dams to contain it plumbing draining and irrigation systems to direct it and submarines to explore its depths. Understanding fluid pressure force per unit area is critical to the success of these projects. 872 CHAPTER 28 More Applications of Integration The fundamental principle is that fluid pressure is directly proportional to depth and when a system is at equilibrium it is the same in all directions. Pressure density depth . This means that given a submerged object in an equilbrium state the fluid pressure down the fluid pressure up and the horizontal fluid pressures on the object are all the same. The hydrostatic force exerted by a fluid on a plane surface of .

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