Principles of Mechanics

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Longmans, Green, 1874 - 313 σελίδες
 

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Σελίδα 13 - 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.
Σελίδα 40 - 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 in the same straight line.
Σελίδα 119 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force expended.
Σελίδα 138 - Hence the above expression measures the importance of the matter which is rotating, or the importance of its inertia, and is therefore called the moment of inertia of the rotating body. THE DIAGRAM OF WORK. 68. The work done by a force can be represented to the eye by a diagram, and engineers habitually refer to such outline figures, in order to estimate at a glance the quantity of work expended in any mechanical operation. It has been stated that the work done by a constant force is the product...
Σελίδα 71 - If three forces, acting at a point, be represented in magnitude and direction by the sides of a triangle taken in order, they will be in equilibrium.
Σελίδα 181 - The specific gravity of a petroleum oil and of mixtures of petroleum products with other substances is the ratio of the weight of a given volume of the material at a temperature of 60° F.
Σελίδα 245 - Ex. 2. A body is projected vertically upwards with a velocity of 100 feet per second : find its height after 3 seconds.
Σελίδα 81 - ... there will be equilibrium when the sum of the moments of the forces acting to turn the body in one direction is equal to the sum of the moments of the forces acting to turn it in the opposite direction. That point in the axis about which the moments are estimated is often called the centre of moments. THE CONDITIONS OF EQUILIBRIUM OF ANY NUMBER OF FORCES ACTING ON A BODY IN ONE PLANE.
Σελίδα 185 - ... is equal to the area of the surface, and altitude equal to the depth of the centre of gravity of the surface below the surface of the fluid.
Σελίδα 181 - C.) to the weight of an equal volume of distilled water at the same temperature, both weights being corrected for the buoyancy of air.

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