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Figure 4.1

Figure 4.1

Any area can be divided into two, each with part of its boundary a straight line. Such a line can be chosen as the axis about which moments are taken. This simplifies the representation of the problem as in Figure 4.2 which also uses equally spaced lines, called ordinates. The device is very apt for ships, since they are symmetrical about their middle line planes, and areas such as waterplanes can be treated as two halves.

Referring to Figure 4.2, the curve ABC has been replaced by two straight lines, AB and BC with ordinates y0, yx and y2 distance h apart. The area is the sum of the two trapezia so formed:

Figure 4.2

The accuracy with which the area under the actual curve is calculated will depend upon how closely the straight lines mimic the curve. The accuracy of representation can be increased by using a smaller interval h. Generalizing for n + 1 ordinates the area will be given by:

How To Have A Perfect Boating Experience

How To Have A Perfect Boating Experience

Lets start by identifying what exactly certain boats are. Sometimes the terminology can get lost on beginners, so well look at some of the most common boats and what theyre called. These boats are exactly what the name implies. They are meant to be used for fishing. Most fishing boats are powered by outboard motors, and many also have a trolling motor mounted on the bow. Bass boats can be made of aluminium or fibreglass.

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