Elementary Introduction to Practical Mechanics: Illustrated by Numerous ExamplesLongmans, 1870 - 324 pages |
From inside the book
Results 6-10 of 14
Page 87
... principle can be applied to the moments of forces . If we measure the moment of a force with reference to a certain point , we may agree to reckon it positive if the force tend to turn the body round that point in a direction contrary ...
... principle can be applied to the moments of forces . If we measure the moment of a force with reference to a certain point , we may agree to reckon it positive if the force tend to turn the body round that point in a direction contrary ...
Page 89
... moments of Qand R with re- spect to o are positive , and that of c P negative , so that we have to prove that FIG . 52 . A B → P m D R Q MR = -MP - MQ Make the same construction as before . Then we have ... PRINCIPLE OF MOMENTS . 89.
... moments of Qand R with re- spect to o are positive , and that of c P negative , so that we have to prove that FIG . 52 . A B → P m D R Q MR = -MP - MQ Make the same construction as before . Then we have ... PRINCIPLE OF MOMENTS . 89.
Page 90
... moments of P and Q are equal and have opposite signs . Exercise . Prop . 3-10 can be proved by reasoning in the ... principle of the parallelo- gram of forces , so far as the direction of the resultant is concerned , can be easily ...
... moments of P and Q are equal and have opposite signs . Exercise . Prop . 3-10 can be proved by reasoning in the ... principle of the parallelo- gram of forces , so far as the direction of the resultant is concerned , can be easily ...
Page 95
... moments of the two couples ( Prop . 11 , Cor . 2 ) , that of the resultant of those two and a third will be the sum ... Principle of Moments to any .... Number of Forces . - Let P1 , P2 RESULTANT OF ANY NUMBER OF COUPLES . 95.
... moments of the two couples ( Prop . 11 , Cor . 2 ) , that of the resultant of those two and a third will be the sum ... Principle of Moments to any .... Number of Forces . - Let P1 , P2 RESULTANT OF ANY NUMBER OF COUPLES . 95.
Page 148
... principle of moments gives us Pa = P1r + P2 + P3 + ..... * If 26 equals DE , p the radius of the end of the screw , μ , μ ' , μ " the co- efficients of friction between screw and nut , screw and DE , and guides and DE respectively ...
... principle of moments gives us Pa = P1r + P2 + P3 + ..... * If 26 equals DE , p the radius of the end of the screw , μ , μ ' , μ " the co- efficients of friction between screw and nut , screw and DE , and guides and DE respectively ...
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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