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MECHANICAL POWERS are certain simple instruments employed in raising greater weights, or overcoming greater resistance than could be effected by the direct application of natural strength. They are usually accounted six in number; viz. the Lever, the...
A Course of Mathematics in Two Volumes for the Use of Academies as Well as ... - Page 145
by Charles Hutton - 1807

## The Nature Study Course with Suggestions for Teaching it Based on Notes of ...

John Dearness - Natural history - 1905 - 244 pages
...and machinery used on the farm and in the household and shop can be analyzed into six simple forms— the lever, the wheel and axle, the pulley, the inclined plane, the wedge and the screw. By the Nature Study method the teacher would not start out by describing the lever, defining weight...

## Elements of Physics

Ernest John Andrews - 1906 - 472 pages
...forces than our own strength, as the wind, water power, steam power, etc. There are six simple machines: the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. Sometimes the wheel and axle is considered as a modified form of the Jever, and the wedge and screw...

## Text-book of Mechanics, Volume 1

Louis Adolphe Martin - Mechanics - 1906 - 190 pages
...applied force is called the mechanical advantage of the machine. The simple machines usually include the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. In the solution of problems involving simple machines no special formulae will be deduced or required;...

## Erecting and Operating: An Educational Treatise for Constructing Engineers ...

Nehemiah Hawkins - Civil engineering - 1907 - 630 pages
...broadly speaking, of engines. Machines are divided into simple and compound. The simple machines are six in number, viz. : The lever. The wheel and axle. The pulley. The inclined plane. The screw. The wedge. These can in turn be reduced to three classes : 1. A solid body turning on an axis....

## General Foundry Practice

Andrew McWilliam, Percy Longmuir - Founding - 1907 - 470 pages
...to the work given out by the system. This simplifies the consideration of all the mechanical powers, the lever, the wheel and axle, the pulley, the inclined plane, the wedge and the screw. Thus, for example, a V>lock and tackle to lift one ton is so arranged that the hand chain moves 60...

## Intermediate and Grammar Methods: A Series of Practical Home ..., Volume 2

William Francis Rocheleau - Correspondence schools and courses - 1909 - 498 pages
...ingeniously joined together. These elements, to which the term mechanical powers is generally applied, are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. Arouse an interest in these mechanical powers by such questions as these: Does a machine create power?...

## Soulé's Philosophic Practical Mathematics: Designed for the Use of ...

George Soulé - Business mathematics - 1910 - 1042 pages
...the direction or the intensity of a force, or both direction and intensity. These Powers are called the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. To fully understand the nature of a machine, four things must be considered, viz.: 1st, The force or...

## A Text-book of Physics

Louis Bevier Spinney - Physics - 1911 - 802 pages
...force; and the force against which the machine operates, the resisting force. The simple machines are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. The mechanical advantage of a machine is the ratio of the resisting force to the working force. The...