Principles of Mechanics

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Longmans, Green, 1891 - 374 стор.
 

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Сторінка 16 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Сторінка 363 - Shew that if three forces acting on a point keep it in equilibrium, each force is proportional to the sine of the angle between the directions of the other two.
Сторінка 206 - Def. The specific gravity of a solid or liquid substance is the ratio of its density to that of water, or, in other words, it is the ratio of the weight of a given volume of the substance to that of an equal volume of water. The water is distilled, and the temperature is 60° F. Def. The specific gravity of a gas is the ratio of the weight of a given volume of the gas to that of an equal volume of air at the same temperature and pressure. The standard temperature is 60° F., and the pressure is that...
Сторінка 41 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Сторінка 81 - If any number of forces, acting at a point, can be represented in magnitude and direction by the sides of a polygon taken in order, they will be in equilibrium.
Сторінка 90 - Prop. To find the conditions of equilibrium of any number of forces acting in one plane upon different points of a rigid body.

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