The Mechanical Principles of Engineering and ArchitectureJ. Wiley, 1875 - 699 стор. |
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Результати 6-10 із 56
Сторінка 103
... square . The first member is therefore always positive ; therefore H sin . ' a - y is always positive . Whence it follows that y can never exceed II sin . a , so that it attains its greatest possible value when it equals H sin . a , a ...
... square . The first member is therefore always positive ; therefore H sin . ' a - y is always positive . Whence it follows that y can never exceed II sin . a , so that it attains its greatest possible value when it equals H sin . a , a ...
Сторінка 125
... square inch ) , so that , for any two given surfaces of contact , there is a constant ratio of the friction to the per- pendicular pressure of the one surface upon the other Whilst this ratio is thus the same for the same surfaces of ...
... square inch ) , so that , for any two given surfaces of contact , there is a constant ratio of the friction to the per- pendicular pressure of the one surface upon the other Whilst this ratio is thus the same for the same surfaces of ...
Сторінка 126
Henry Moseley. not exceeding a certain limit ( per square inch ) , their friction is the same whatever may be the extent of their surfaces of contact . 4thly . That the friction of motion is wholly independent of the velocity of the ...
Henry Moseley. not exceeding a certain limit ( per square inch ) , their friction is the same whatever may be the extent of their surfaces of contact . 4thly . That the friction of motion is wholly independent of the velocity of the ...
Сторінка 127
... square inch , under which pressure a perfect separation of two surfaces is made by the interposition of a continuous stratum of that unguent between them , and which pressure per square inch being exceeded , that perfect separation can ...
... square inch , under which pressure a perfect separation of two surfaces is made by the interposition of a continuous stratum of that unguent between them , and which pressure per square inch being exceeded , that perfect separation can ...
Сторінка 128
... square inch , which corresponds to the minimum resistance , to be 90lbs . in the case of axles of wrought iron turning upon cast iron , with fine neat's foot oil . The experiments of Mr. Wood , whilst they place the general results ...
... square inch , which corresponds to the minimum resistance , to be 90lbs . in the case of axles of wrought iron turning upon cast iron , with fine neat's foot oil . The experiments of Mr. Wood , whilst they place the general results ...
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Загальні терміни та фрази
a₁ angle of resistance angular velocity axes axis beam body bordering upon motion centre of gravity circumference co-efficient compression conical surfaces corresponding crank crank arm cubic foot curve cylinder deflexion determined displaced fluid distance ditto driven wheel driving epicycloidal equal equation equilibrium evident exceedingly small extrados forces formula friction given horizontal hypocycloidal inclination inertia intersect involute lamina length limiting angle line of centres line of resistance load machine modulus moment of inertia moving n₁ n₂ neutral line observing obtain oscillation P₁ P₂ parallel passing perpendicular pitch circle plane point of application point of contact portion position radius repre respect resultant revolution revolve rupture space stability Substituting supposed surfaces of contact taken to represent tion tooth U₁ unguent vertical vis viva viva voussoirs wall weight whence it follows whilst whole