Elementary Introduction to Practical Mechanics: Illustrated by Numerous ExamplesLongmans, 1870 - 324 страници |
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Страница 23
... represented by U , the number expended in overcoming prejudicial resistances by U。, and the number expended usefully by U1 , all in the same given time , then it admits of proof in the case of a machine moving uniformly , that U = U2 + ...
... represented by U , the number expended in overcoming prejudicial resistances by U。, and the number expended usefully by U1 , all in the same given time , then it admits of proof in the case of a machine moving uniformly , that U = U2 + ...
Страница 25
... represented by A B in the accompanying figures ; of which fig . 2 represents the ordinary undershot wheel with plane float boards ; fig . 3 the breast wheel , in which the water acts upon the float boards considerably above the level of ...
... represented by A B in the accompanying figures ; of which fig . 2 represents the ordinary undershot wheel with plane float boards ; fig . 3 the breast wheel , in which the water acts upon the float boards considerably above the level of ...
Страница 34
... represent interest on capital , repairs , and restitution . It may interest the reader to consider the following statement taken from Mr. R. Stephenson's paper on Railway Economy which forms an appendix to Mr. Smiles's Life of George ...
... represent interest on capital , repairs , and restitution . It may interest the reader to consider the following statement taken from Mr. R. Stephenson's paper on Railway Economy which forms an appendix to Mr. Smiles's Life of George ...
Страница 36
... represents the s feet on scale , and the perpendicular a D represents the P lbs . on the same scale : then , since the area of ABCD contains PS square units on the same scale , that area will correctly re- present the work done by P ...
... represents the s feet on scale , and the perpendicular a D represents the P lbs . on the same scale : then , since the area of ABCD contains PS square units on the same scale , that area will correctly re- present the work done by P ...
Страница 37
... represent re- spectively the space through which the force has acted and the magnitude of the force , then will the area of the curve between any two ordinates represent the work done by the force while acting through a space represented ...
... represent re- spectively the space through which the force has acted and the magnitude of the force , then will the area of the curve between any two ordinates represent the work done by the force while acting through a space represented ...
Често срещани думи и фрази
accelerative effect angle of resistance angular angular velocity axis axle beam body brickwork cast iron centre of gravity circle circumference coefficient of friction Crown 8vo cubic foot curve cylinder described determine the number diameter direction distance draw Edition engine epicycloid equal equation equilibrium expended extrados forces acting formula given hence horizontal horse-power inclined inclined plane last Example length limiting angle line of resistance mass middle point minute moment of inertia motion moving number of feet number of units oscillation P₁ parallel forces perpendicular plane pressure principle of moments Prop pulley radius raised reaction represent respectively rest resultant right angles rope round screw sliding space square inch steam suppose surface teeth thick thread tion triangle vertical virtual velocities vols wall weight wheel Woodcuts wrought iron
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