The mechanical Euclid, containing the elements of mechanics and hydrostatics1837 |
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Página 27
... turn it round the fulcrum . 15. The portions of the rod between the fulcrum and the points where the forces are applied , are called the arms . 16. When the arms are two portions of the same straight line , the lever is called a ...
... turn it round the fulcrum . 15. The portions of the rod between the fulcrum and the points where the forces are applied , are called the arms . 16. When the arms are two portions of the same straight line , the lever is called a ...
Página 28
... turn it op- posite ways , they will keep each other in equilibrium . If AC BC , and P and Q be two equal forces acting perpendicularly on CA and = CB at A and B , they will balance each other . 3. If forces keep each other in ...
... turn it op- posite ways , they will keep each other in equilibrium . If AC BC , and P and Q be two equal forces acting perpendicularly on CA and = CB at A and B , they will balance each other . 3. If forces keep each other in ...
Página 29
... turn the lever round the fulcrum will be the same , whatever be the angle which the arm makes with the other arm , so long as the length is the same . B If a force Q act perpendicularly on CB at its extremity B , C being the fulcrum ...
... turn the lever round the fulcrum will be the same , whatever be the angle which the arm makes with the other arm , so long as the length is the same . B If a force Q act perpendicularly on CB at its extremity B , C being the fulcrum ...
Página 32
... turn by its weight . In CB , produced if ne- cessary , take CG equal to CF , and suppose a fulcrum placed at G. Let the weights at P , Q , R , S be denoted by P , Q , R , S. The two weights P and Q produce upon the ful- crums F and G ...
... turn by its weight . In CB , produced if ne- cessary , take CG equal to CF , and suppose a fulcrum placed at G. Let the weights at P , Q , R , S be denoted by P , Q , R , S. The two weights P and Q produce upon the ful- crums F and G ...
Página 38
... turn , the Power is the force of the fin- gers , the Weight is the pressure exerted by the coal upon the ends of the tongs . * PROP . VII . If two forces acting perpendi- cularly at the extremities of the straight arms of a bent lever ...
... turn , the Power is the force of the fin- gers , the Weight is the pressure exerted by the coal upon the ends of the tongs . * PROP . VII . If two forces acting perpendi- cularly at the extremities of the straight arms of a bent lever ...
Otras ediciones - Ver todas
The Mechanical Euclid, Containing the Elements of Mechanics and Hydrostatics William Whewell Sin vista previa disponible - 2015 |
Términos y frases comunes
ABCD Accelerating Force algebraical quantities Axioms of Statics axis balance body falling body moving center of gravity column of fluid deductive deductive reasoner definition density destroy direction equilibrium exerted fluid displaced forces acting fulcrum Geometry heavy fluid Hence horizontal plane horizontal pressures hydrostatic balance Hydrostatics idea immersed inclined plane INDUCTIVE PRINCIPLE lever magnitude manner mathematical mercury opposite P's velocity parallel particle perpendicular piston portions pressure on LM prism produce proportion pully Q. E. D. PROP quantity of matter ratio reasoning represent rest right angle SCHOLIUM sides space described specific gravity straight line string supposed surface pressed tical tions triangles truth tube uniform force University of Cambridge upper surface valve velocity acquired vertical column vertical line vessel weight
Pasajes populares
Página 22 - A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. 5. The inclination of a straight line to a plane...
Página 46 - If three forces, represented in magnitude and direction by the sides of a triangle, act on a point, they will keep it at rest.
Página 9 - Sacred History, from the Creation of the World to the Destruction of Jerusalem. With Questions for Examination.
Página 18 - ... if the multiple of the first be equal to that of the second, the multiple of the third is also equal to that of the fourth : or, if the multiple of the first be greater than that of the second, the multiple of the third is also greater than that of the fourth.
Página 47 - There is an equilibrium upon the wheel and axle when the power is to the weight as the radius of the axle to the radius of the wheel.
Página 20 - IF a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those produced, proportionally; and if the sides, or the sides produced, be cut proportionally, the straight line which joins the points of section shall be parallel to the remaining side of the triangle...
Página 97 - ... gravity of the fluid : the specific gravity of the body. Prop. 10. To describe the hydrostatic balance, and to shew how to find the specific gravity of a body by means of it, 1st, when its specific gravity is greater than that of the fluid in which it is weighed ; 2ndly, when it is less.