Механизация производственных процессов. - 25 стр.

8. This book was published in Great Britain.
                                     Forces
        The word “force” is a general term for any push or pull. A force is
always exerted on a body by another body or on a part of a body by another
part.
        A force may act through a contact, or it may act from a distance like
gravitational or magnetic attraction. It may act on a point of a body or be
distributed over a considerable area. But whether exerted through a contact or
from a distance a force is always exerted on something and by something.
        The force acts along the line. The line of action of any force is a line of
indefinite length parallel to the direction of the force and containing its point of
application. To specify a force, it is necessary to know its direction, magnitude
and sense. Hence, forces are vector quantities. They must be added, subtracted,
multiplied and divided vectorially. The ordinary arithmetic rules of addition,
subtraction, multiplication and division used for scalar quantities cannot be
applied, except in special cases. Forces can be represented by straight lines.
The length of the line represents the magnitude of the force. The direction of
the line is that of force. The head of the arrow of the line shows whether the
force acts up of down, to the right or to the left, etc.
        If a force acts on a body that is free to move, the body moves in the
direction of the force. When two forces are applied in opposite directions, the
body moves in the direction of the greater force. The force tending to move the
body in this case is the difference between the two forces. When the forces act
in the same direction, the equivalent force known as the resultant is the sum of
the two forces.

Упр.I.Подберите русские эквиваленты к следующим словам и
словосочетаниям:
1)general; 2)term; 3)force; 4)body; 1)на расстоянии; 2) действовать;
5)by another part; 6)from a distance; 3)точка приложения; 4) термин;
7)area; 8) straight line; 9)magnitude; 5)в особых случаях; 6)площадь;
10) of indefinite length; 11) opposite; 7) противоположный; 8) тело;
12) point of application; 13) to act; 9) представлять, изображать;
14) in special cases; 15) equivalent; 10)прямая линия; 11) величина;
16) to represent; 17) difference;      12) другой частью; 13)вычитать;
18) to subtract.                       14) неопределенной длины;
                                       15)разность;16) получать;
                                       17)общий, общеупотребительный;
                                       18)равнозначный, эквивалентный;
                                        19) направление; 20) сила.