applications of integration in this chapter we explore some of the applications of the definite...

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Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves 2.Computing the volumes of solids 3.Computing the work done by a varying force 4.Computing average value of a function The common theme is the following general method, which is similar to the one we used to find areas under curves: We break up a Q quantity into a large number of small parts. We next approximate each small part by a quantity of the form and thus approximate Q by a Riemann sum. Then we take the limit and

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Page 1: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Applications of IntegrationIn this chapter we explore some of the applications of thedefinite integral by using it for1. Computing the area between curves2. Computing the volumes of solids3. Computing the work done by a varying force4. Computing average value of a function

The common theme is the following general method, which is similar to the one we used to find areas under curves:

We break up a Q quantity into a large number of small parts. We next approximate each small part by a quantity of the form and thus approximate Q by a Riemann sum. Then we take the limit and express Q as an integral Finally we evaluate the integral using the Fundamental Theorem of Calculus or the Midpoint Rule.

Page 2: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

1. Computing the area between Curves

We define the area of as the limiting value of the sum of the areas of the following approximating rectangles.

Page 3: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 4: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 5: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 6: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 7: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 8: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 9: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Find the area of the shaded region.

Page 10: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

2. Computing the volumes of solidsIn trying to find the volume of a solid we face the same type of problem as in finding areas. We have an intuitive idea of what volume means, but we must make this idea precise by using calculus to give an exact definition of volume.We start with a simple type of solid called a cylinder (or, more precisely, a right cylinder). As illustrated in Figure 1(a), a cylinder is bounded by a plane region , called the base, and a congruent region in a parallel plane. The cylinder consists of all points on line segments that are perpendicular to the base and join to . If the area of the base is and the height of the cylinder (the distance from to ) is , then the volume of the cylinder is defined asIn particular, if the base is a circle with radius , then the cylinder is a circular cylinder with volume [see Figure 1(b)], and if the base is a rectangle with length and width then the cylinder is a rectangular box (also called a rectangular parallelepiped) with volume [see Figure 1(c)].

Page 11: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 12: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 13: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 14: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 15: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 16: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 17: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 18: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 19: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 20: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 21: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 22: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 23: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 24: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 25: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 26: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

The solids in Examples 1–5 are all called solids of revolution because they are obtained by revolving a region about a line. In general, we calculate the volume of a solid of revolution by using the basic defining formula

We find the cross-sectional area in one of the following ways:

Page 27: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 28: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

1

Page 29: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 30: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 31: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 32: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 33: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 34: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 35: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 36: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer

1.

Review Problems

Page 37: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

2.

Page 38: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

3.

Page 39: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

4.

Page 40: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Set up, but do not evaluate, an integral for the volume of the solid obtained by rotating the region bounded by the given curves about the specified line.

1.

2.

3.

Page 41: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

4.

Page 42: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the Specific line. Sketch the region and a typical shell.1.

2.

Page 43: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

3.

Page 44: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

4.

Page 45: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

5.

Page 46: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

4. Computing average value of a function

Page 47: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 48: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

Find the average value of the function on the given interval.

1.

2.

3.

Page 49: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

1.

2.

Page 50: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 51: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 52: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

3. Computing the work done by a varying force

1

2

Page 53: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 54: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

3

Page 55: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 56: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 57: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 58: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 59: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves
Page 60: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

A tank is full of water. Find the work required to pump the

water out of the outlet.

Page 61: Applications of Integration In this chapter we explore some of the applications of the definite integral by using it for 1.Computing the area between curves

A tank is full of water. Find the work required to pump the water out of the outlet. Use the fact that water weighs 62.5 lb/ft.