Elementary introduction to practical mechanicsLongmans, Green, 1880 - 339 σελίδες |
Συχνά εμφανιζόμενοι όροι και φράσεις
angle of resistance angular angular velocity axis axle beam body brickwork cast iron centre of gravity coefficient of friction couple cubic feet cubic foot curve cylinder denote determine the number diameter direction distance draw equation equilibrium expended extrados feet of water fixed point forces acting formula friction frustum ft.-pds given hence horizontal horse-power inclined last example length limiting angle magnitude middle point minute modulus moment of inertia moments motion moving number of foot-pounds P₁ P₂ parallel forces parallelogram perpendicular piston plane pressure principle of moments Prop pulley radius raised reaction rectangular represent respectively rest resultant right angles rope round screw specific gravity square inch steam engine suppose surface teeth tension thick thread three forces tion tons triangle velocity wall weight wheel wrought iron
Δημοφιλή αποσπάσματα
Σελίδα 276 - Whatever draws or presses another is as much drawn or pressed by that other. If you press a stone with your finger, the finger is also pressed by the stone. If a horse draws a stone tied to a rope, the horse (if I may so say) will be equally drawn back towards the stone...
Σελίδα 276 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Σελίδα 333 - TVth, y^jth, &c. of a square inch had been assigned ; therefore the area of a circle is the limit of the area of the inscribed polygon. The simplest form which the reasoning on limits can assume is the following : — Suppose it can be proved that two variable quantities x and Y remain equal throughout their variations, and suppose that x continually approaches a limit A, while Y...
Σελίδα 90 - Prove that the algebraic sum of the moments of two concurrent forces about any point in their plane is equal to the moment of their resultant about the same point.
Σελίδα 8 - Centigrade thermometer, the freezing point is marked 0°, or zero, and the boiling point 100° ; the distance between the freezing and boiling points is divided into 100 equal parts; these equal divisions are carried as far below the freezing point and above the boiling point as desired.
Σελίδα 259 - A particle is projected with a velocity V in a direction making an angle a with the horizontal...
Σελίδα 63 - ... the sum of the moments of those forces which tend to turn the body in one direction about...
Σελίδα 287 - Def.—If we conceive a body to consist of a large number of heavy points, and multiply the 'mass of each by the square of its perpendicular distance from a given line or axis, the sum of all these products is the moment of inertia of the body with respect to that axis.
Σελίδα 127 - If a plane curve revolve about an axis fixed in its plane, the volume of the solid described is found by multiplying the area of the curve by the length of the path of its centre of gravity. Let ABCD be the plane curve; the lines AC and BD are perpendicular to CD, the axis about which it revolves; find G its centre of gravity, and draw GM at right angles to CD : we have to show that the volume of the solid described by the revolution of ABCD equals the length...
Σελίδα 317 - ... that the distance from the point of suspension to the centre of the ball is the length of the pendulum, show that the error is less than the 0-001 of an inch.