Elementary Introduction to Practical Mechanics: Illustrated by Numerous ExamplesLongmans, 1870 - 324 pages |
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Page 7
... middle ; they are accu- rately the same length , at 62 ° F .; to their ends E A are fastened by pivots tongues CAE ... point E may remain unmoved by the expansion or contraction of the bar . The length of a B is 10 ft . and the ...
... middle ; they are accu- rately the same length , at 62 ° F .; to their ends E A are fastened by pivots tongues CAE ... point E may remain unmoved by the expansion or contraction of the bar . The length of a B is 10 ft . and the ...
Page 45
... middle point 50 ft . above the ground . ] Ex . 153. A shaft has to be sunk to the depth of 130 fathoms through chalk ; the diameter of the shaft is 10 ft .; how many units of work must be expended in raising the materials ? In how long ...
... middle point 50 ft . above the ground . ] Ex . 153. A shaft has to be sunk to the depth of 130 fathoms through chalk ; the diameter of the shaft is 10 ft .; how many units of work must be expended in raising the materials ? In how long ...
Page 53
... middle point of its geometrical axis : and as a uniform rod is merely a thin cylinder its centre of gravity will be at its middle point . Ex . 172. Two men , A and B , carry a weight of 3 cwt . slung on a pole , the ends of which rest ...
... middle point of its geometrical axis : and as a uniform rod is merely a thin cylinder its centre of gravity will be at its middle point . Ex . 172. Two men , A and B , carry a weight of 3 cwt . slung on a pole , the ends of which rest ...
Page 54
... point of support be on which the beam when horizontal will rest , and what will be the pressure on that point ? Ans ... middle point of the upper block is exactly over a point in the axis of the lower , and the end of the lower in ...
... point of support be on which the beam when horizontal will rest , and what will be the pressure on that point ? Ans ... middle point of the upper block is exactly over a point in the axis of the lower , and the end of the lower in ...
Page 58
... middle points of AD and BC ; on E act two forces , P and Q , in such directions that PEF - 45 ° and QEF = 30 ° ; the ... point of attachment to the bank is 72 ft .; each rope is pulled by a force of 7 cwt .; the boat moves straight down the ...
... middle points of AD and BC ; on E act two forces , P and Q , in such directions that PEF - 45 ° and QEF = 30 ° ; the ... point of attachment to the bank is 72 ft .; each rope is pulled by a force of 7 cwt .; the boat moves straight down the ...
Common terms and phrases
ABCD 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 friction frustum given hence horizontal horse-power inclined inclined plane last Example length limiting angle magnitude mass middle point minute modulus moment of inertia motion moving number of units oscillation P₁ parallel forces passing perpendicular plane pressure principle principle of moments Prop pulley R₁ 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 vols wall weight wheel Woodcuts wrought iron
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