The Elements of Analytic Mechanics: Solids & FluidsJ. Wiley & sons, 1876 - 472 trang |
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Thuật ngữ và cụm từ thông dụng
acceleration acting action action-line angle angular velocity applied axes axis body C₁ centre of gravity centrifugal force constant cos² curve density direction distance dt dt dt² earth ellipse energy equal equation equilibrium fluid force of gravity friction gives h₁ head due hence horizontal plane impact impulse inertia initial integrating kinetic energy length liquid M₁ M₂ mass maximum moment of inertia momentum motion move Mv² normal orifice origin of coördinates P₁ parabola parallel particle passing perpendicular position pounds preceding pressure produce radius of gyration reference resistance resultant rotation shearing stress similarly sin² sphere stream stress string substituted surface Take the origin tangential tension tion uniform v₁ vane vertical vessel vis viva w₁ weight wheel x₁ Y₁ zero
Đoạn trích phổ biến
Trang 67 - If three forces, acting at a point, be represented in magnitude and direction by the sides of a triangle taken in order, they will be in equilibrium.
Trang 220 - Pendulum vibrating Seconds of Mean Time in the Latitude of London in a Vacuum at the Level of the Sea...
Trang 179 - Remembering that the resistance of the air varies as the square of the velocity, it might easily be shown that the strength should be at least eight times, instead of twice, as great. Passing to the question of power. The soaring of birds is a most important fact, of which no one who has taken the trouble to make observations has any doubt. Though it was lately the subject of a...
Trang 63 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Trang 267 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Trang 63 - Change of motion is proportional to the force impressed, and is in the direction of the line in which the force acts.
Trang 96 - The distance of the centre of gravity of a circular arc from the centre of the circle is a fourth proportional to the length of the arc, the radius of the circle, and the chord of the arc.
Trang 65 - If two forces acting at a point be represented in magnitude and direction by the adjacent sides of a parallelogram, the resultant...
Trang 165 - The moment of inertia of an area with respect to an axis is the sum of the products obtained by multiplying each element of the area dA by the square of its distance from the axis y; it is therefore the quantity fdA • y2.
Trang 189 - The radius vector (line joining the centre of the sun with the centre of the planet) of each planet sweeps over equal areas in equal times. 3. The squares of the periodic times (the periods of complete revolution round the sun) of two planets are proportional to the cubes of their mean distances from the sun.