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Βιβλία Βιβλία 41 - 50 από 184 για These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the....
" These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. "
A Practical Treatise on Arithmetic ...: Combining the Useful Properties of ... - Σελίδα 246
των George Leonard (jr.) - 1841 - 340 σελίδες
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Elements of Natural Philosophy: Embracing the General Principles of ...

Leonard Dunnell Gale - 1838 - 276 σελίδες
...as long to lift it through the same H»ce. LXXII. There are usually reckoned six mechanical powers : the lever ; the wheel and axle ; the pulley ; the inclined plane ; the wedge ; and the screw. THE LEVER. LXXIII. THE LEVER is a bar of iron or wood, supported by and moveable...

A Practical Treatise on Arithmetic: Wherein Every Principle Taught is ...

George Leonard (Jr.) - 1839 - 347 σελίδες
...specific gravity 1 Answer, 2,720. SIMPLE MACHINES, SOMETIMES CALLED MECHANICAL POWERS. LESSON 185. There are usually reckoned six simple machines —...of men, oxen, horses, moving water, wind, &c. THE LEVEH. The support or prop round which the lever moves, is called the fulcrum. Figure 22. ~TT : I There...

The National Arithmetic, on the Inductive System: Combining the Analytic and ...

Benjamin Greenleaf - 1839 - 305 σελίδες
...The body which receives motion from another, is called the weight. The mechanical powers are five, the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Screw and the Wedge. LEVER. The lever is a bar, movable about a fixed point, called its fulcrum or prop. It is in theory...

A manual for mechanics' institutions

Society for the diffusion of useful knowledge - 1839
...manner at another point, is a machine. The simple machines or mechanical powers are six in number — the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. These are the elements of all machines, however complicated. See Mcch., Treat....

Lectures on Select Subject in Mechanics, Hydrostatics, Pneumatics, Optics ...

James Ferguson - 1839 - 463 σελίδες
...made. 1 he me' The simple machines, usually called mechanical powers, powers, are six in number, viz. the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screws.0 — They are called mechanical powers, because they help us mechanically to...

The Christian philosopher

Thomas Dick - 1840
...machines, the principles on which their energy depends ; the properties of the mechanical powers — the lever, the wheel, and axle, the pulley, the inclined plane, the wedge and the screw — and the effects resulting from their various combinations. From the investigations...

The artillerist's manual, and compendium of infantry exercise

Frederick Augustus Griffiths - 1840
...be effected by the natural strength without them. They are usually accounted Six in number ; viz. : The Lever ; the Wheel, and Axle ; the Pulley ; the Inclined Plane ; the Wedge ; and the Screw. Weight, and Power when opposed to each other, signify the body to be moved,...

The North American Arithmetic: part third

Frederick Emerson - 1840
...effected by the direct application of natural strength. They are usually accounted six in number; viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. The advantage gained by the use of the mechanical powers, does not consist in...

A Practical Treatise on Arithmetic, [etc.].

George Leonard - 1841 - 340 σελίδες
...grs. ; what is the specific gravity of the charcoal ? Ans. .400. 3. If a piece of marble weighs 1 80 pounds, and you find the bulk by immersing it in water,...wheel and axle, the pulley, the inclined plane, the icrew, and the wedge. The force that raises a weight, or overcomes a resistance, is called the power....

The National Arithmetic ...: Combining the Analytic and Synthetic Methods ...

Benjamin Greenleaf - 1841 - 314 σελίδες
...The body which receives motion from another, is called the weight. The mechanical powers are five, the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Screw and the Wedge. LEVER. The lever is a bar, movable about a fixed point, called its fulcrum or prop. It is in theory...




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