Elementary Introduction to Practical Mechanics: Being the 2d Ed. of Èlementary Examples in Practical Mechanics'.Longman, Green, Longman, Roberts & Green, 1863 |
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Страница 9
... middle ; they are accu- rately the same length , at 62 ° F .; to their ends are fastened by pivots tongues CAE and ... point E may remain unmoved by the expansion or contraction of the bar . The length of AB is 10 ft . and the distance ...
... middle ; they are accu- rately the same length , at 62 ° F .; to their ends are fastened by pivots tongues CAE and ... point E may remain unmoved by the expansion or contraction of the bar . The length of AB is 10 ft . and the distance ...
Страница 44
... centre of gravity will have to be raised from the ground to the centre of gravity of the column , i . e . to its middle point 50 feet above the ground . ] - Ex . 153. A shaft has to be sunk to a depth of 130 fathoms through chalk ; the ...
... centre of gravity will have to be raised from the ground to the centre of gravity of the column , i . e . to its middle point 50 feet above the ground . ] - Ex . 153. A shaft has to be sunk to a depth of 130 fathoms through chalk ; the ...
Страница 52
... 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 . 171. - Two men , A and B , carry a weight of 3 cwts . slung on a pole , the ends of which ...
... 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 . 171. - Two men , A and B , carry a weight of 3 cwts . slung on a pole , the ends of which ...
Страница 55
... middle points of AD and BC ; on E act two pressures , P and Q , in such directions that PEF = : 45 ° and QEF = 30 ... point of attachment to the bank is 72 ft .; each rope is pulled by a pressure of 7 cwts .; the boat moves straight down the ...
... middle points of AD and BC ; on E act two pressures , P and Q , in such directions that PEF = : 45 ° and QEF = 30 ... point of attachment to the bank is 72 ft .; each rope is pulled by a pressure of 7 cwts .; the boat moves straight down the ...
Страница 69
... middle point of the rafter , and therefore can be replaced by weights equal to w acting at each end of the rafter ; so that the whole weight sus- tained by AB and AC may be distributed as shown in the figure , viz . , it will be ...
... middle point of the rafter , and therefore can be replaced by weights equal to w acting at each end of the rafter ; so that the whole weight sus- tained by AB and AC may be distributed as shown in the figure , viz . , it will be ...
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ABCD accelerating force angle of resistance angular velocity axis axle beam body brickwork capstan cast iron centre of gravity circle circumference coefficient of friction cubic feet cubic foot curve cwts cycloid cylinder described determine the number diameter direction distance draw Edition epicycloid equal equation equilibrium expended extrados Fcp 8vo formula frustum given hence horizontal horse-power inclined inertia last example length limiting angle magnitude middle point minute modulus moment of inertia moments motion moving number of units oscillation P₁ P₂ parallel pressures passing perpendicular plane Post 8vo pres pressures acting principle principle of moments Prop pulley radius raised reaction represent respectively resultant right angles rope round screw sliding square inch suppose surface system of pressures teeth thick thread tion triangle vertical vols wall weight wheel wrought iron
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