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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: For the Use of Academies, as Well as Private Tuition - Page 154
by Charles Hutton - 1831

## The operative mechanic's workshop companion, and the scientific gentleman's ...

...resistances overcome with the exertion of less power or strength than is necessary without them. They are usually accounted six in number, viz., the lever,...pulley, the inclined plane, the wedge, and the screw; but properly two of these comprise the whole, namely, the lever and inclined plane, — the wheel and...

## Sir Edward Thomasons̓ Memoirs During Half a Century ...

Sir Edward Thomason - 1845
...innumerable works written on these subjects into a small space, Mr. T. mentions the mechanical powers, the lever, the wheel and axle, the pulley, the inclined plane, the wedge and screw, the theory of friction, pressure, percussion, &c., and as much of their application to useful...

## A Manual of Natural Philosophy: Compiled from Various Sources, and Designed ...

John Johnston - Physics - 1846 - 302 pages
...machines or instruments, with which we are accustomed to raise weights and overcome resistances. They are six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, Quest. 113. What are the mechanical powers? How many of them are there ? Does each one of these act...

## Improvement to Palmer's Endless Self-computing Scale and Key: Adapting it to ...

John E. Fuller - Ready-reckoners - 1846 - 72 pages
...raise, through a less space, a weight heavier than itself. Power is gained at the expense of space, by the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. LEVER. Case 1. — When the fulcrum of the lever is between the power and the weight. 66 of leverage...

## A Compendium of Natural Philosophy: Adapted to the Use of the General Reader ...

Denison Olmsted - Physics - 1846 - 420 pages
...the Egyptians. The elements of machinery are found in what aie called the Meclumical Powers. They are six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Screw, and the Wedge. THE LEVEE. \$ 117. The LEVER is an inflexible bar or rod, some point of which...

## A Technological Dictionary: Explaining the Terms of the Arts, Sciences ...

W. M. Buchanan - Science - 1846 - 755 pages
...constitutes the science of mechanics. The mechanical powers are usually divided into six classes ; the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw ; but all these are reducible to two, the lever and the inclined plane Some, however, regard the pulley...

## Outlines of Natural Philosophy: For the Use of Schools and Private Learners

C. List - Physics - 1846 - 162 pages
...the elements of which the compound are composed. They appear in six different forms, which are called the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. These are called the Mechanical Powers. We should be careful not to adopt the mistaken idea which is...

## The American Arithmetic

...regulate moving power, or to produce motion so as to save time or force. The mechanical powers are six in number, viz. : the Lever, the Wheel and Axle,...Pulley, the Inclined Plane, the Wedge, and the Screw. The weight signifies the body to be moved, or the resistance to be overcome ; and the power is the...