First Lessons in Geometry: With Practical Applications in Mensuration, and Artificers' Work and Mechanics |
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Page xiv
... MECHANICAL POWERS . General principles Lever - Different kinds Pulley . Wheel and axle . Inclined Plane . Wedge Screw . • General remarks . 233 233 234-236 237-239 • 240 241 242 243 244 SECTION IV . Specific Gravity - Definition of 245 ...
... MECHANICAL POWERS . General principles Lever - Different kinds Pulley . Wheel and axle . Inclined Plane . Wedge Screw . • General remarks . 233 233 234-236 237-239 • 240 241 242 243 244 SECTION IV . Specific Gravity - Definition of 245 ...
Page 232
... fall ? 12. If the centre of gravity is near the base , is the body less , or more likely to fall than when it is further from the base ? Give the illustration . Of the Mechanical Powers . SECTION III . OF THE 232 INTRODUCTION TO MECHANICS .
... fall ? 12. If the centre of gravity is near the base , is the body less , or more likely to fall than when it is further from the base ? Give the illustration . Of the Mechanical Powers . SECTION III . OF THE 232 INTRODUCTION TO MECHANICS .
Page 233
... Mechanical Powers . SECTION III . OF THE MECHANICAL POWERS . 1. There are six simple machines , which are called Mechanical powers . They are , the Lever , the Pulley , the Wheel and Axle , the Inclined Plane , the Wedge , and the Screw ...
... Mechanical Powers . SECTION III . OF THE MECHANICAL POWERS . 1. There are six simple machines , which are called Mechanical powers . They are , the Lever , the Pulley , the Wheel and Axle , the Inclined Plane , the Wedge , and the Screw ...
Page 234
... Mechanical Powers . resistance exactly balances the power , in which case all the parts of the machine are at rest . We shall first examine the lever . 4. The Lever , is a straight bar of wood or metal , which moves around a fixed point ...
... Mechanical Powers . resistance exactly balances the power , in which case all the parts of the machine are at rest . We shall first examine the lever . 4. The Lever , is a straight bar of wood or metal , which moves around a fixed point ...
Page 235
... Mechanical Powers . 5. An equilibrium is produced in all the levers when the weight multiplied by its distance from the fulcrum , is equal to the product of the power multiplied by its distance from the fulcrum . That is , The weight is ...
... Mechanical Powers . 5. An equilibrium is produced in all the levers when the weight multiplied by its distance from the fulcrum , is equal to the product of the power multiplied by its distance from the fulcrum . That is , The weight is ...
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Common terms and phrases
12 feet 20 feet acres altitude bisect bounded by Planes breadth called centre of gravity chord circular sector circumfer circumference cone convex surface cubic feet cubic foot cubic inches cylinder decimal diagonals diameter distance divide draw equilateral triangle EXAMPLES Explain the manner feet 6 inches figure find the area find the solidity frustum given angle given line given point gles half hypothenuse intersect line be drawn linear unit lower base manner of inscribing Mensuration of Surfaces multiplied number of square parallel planes parallelogram parallelopipedon pentagon pentagonal pyramid perpendicular Practical Geometry.-Problems PROBLEM pulley pyramid radius rectangle regular polygon regular solids Required the area rhombus right angled triangle Round Bodies RULE scale of equal secant line segment similar polygons similar triangles slant height solid content solid feet Solids bounded specific gravity sphere square feet square yards straight line tangent thickness upper base weight
Popular passages
Page 20 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Page 32 - The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U be the unit of surface. .R axb U' Then 1x1 But - is the area of R.
Page 40 - Similar triangles are to each other as the squares described on their homologous sides. Let ABC, DEF be two similar triangles...
Page 82 - A zone is a portion of the surface of a sphere included between two parallel planes.
Page 235 - An equilibrium is produced in all the levers, when the weight multiplied by its distance from the fulcrum is equal to the product of the power multiplied by its distance from the fulcrum. That...
Page 84 - The convex surface of a cylinder is equal to the circumference of its base multiplied by its altitude.
Page 34 - The area of a triangle is equal to half the product of the base and height.
Page 35 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal in all their parts." Axiom 1. "Things which are equal to the same thing, are equal to each other.
Page 20 - For this purpose it is divided into 360 equal parts, called degrees, each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The degrees, minutes, and seconds, are marked thus, °, ', " ; and 9° 18' 10", are read, 9 degrees, 18 minutes, and 10 seconds.
Page 83 - The surface of a sphere is equal to the product of its diameter by the circumference of a great circle.