A Treatise on Infinitesimal Calculus: The dynamics of material systems. 1862University Press, 1862 |
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Otras ediciones - Ver todo
Términos y frases comunes
a₁ angle angular velocity axial components axis passing b₁ blow body rotates central ellipsoid central principal centre of gravity cone confocal coordinate axes couple D'Alembert's principle determined direction-cosines displacement distance dt dt dt dt2 dt2 earth ellipse ellipsoid of gyration equal equations of motion expressed fixed point focal conic given impressed momentum-increments infinitesimal invariable plane isochronous Let the rotation-axis let us suppose line of action mass moment of inertia momental ellipsoid moments of inertia momentum Mp² origin oscillation P₁ parallel pendulum perpendicular plate polhode position principal axes principal moments principal plane quantities radii radius of gyration radius vector relative second degree shews sphere string surface system of particles theorem tion values velocity-increment vertex vertical vis viva viva w₁ w₂
Pasajes populares
Página 298 - Newton discovered, as a fundamental law of nature, that every particle attracts every other particle with a force which varies directly as the product of the masses and inversely as the square of the distance between them.
Página 13 - To prove that the locus of the middle points of a system of parallel chords of a parabola is a straight line parallel to the axis of the parabola.
Página 542 - This proves the first part of the theorem. To prove the second part : Take any two lines of the system, 34 and 56.
Página 89 - ... bottom of which are formed by planes perpendicular to its axis, contains elastic fluid, the weight of which may be neglected. If the vessel revolve uniformly about its axis, find the pressure at any point of the fluid mass. 6. The motion of rotation of a rigid system acted on by any forces, about its centre of gravity, is the same as if the centre of gravity were fixed, and the same forces acted. A heavy beam moves about a horizontal axis passing through one extremity ; apply the preceding principle...
Página 93 - Conservation of vis viva., the Principle of the Conservation of the Motion of the Centre of Gravity, and the like.
Página 188 - Ip = /« — /„, or the polar moment of inertia is equal to the sum of the moments of inertia about any two axes at right angles to each other in the plane of the area and intersecting at the pole.
Página 536 - ... x = r sin 6 cos <f>, y — r sin 6 sin <f>, z = r cos 6.
Página 122 - 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...
Página 38 - ... and the greater the gain of the dial upon the hand. The wheels of both dial and hand are constantly revolving in the direction opposite to that of the' motion of the hands of a watch. The belt of the hand-wheel runs always upon the rod, where its diameter is constant, and as the rod moves laterally under the little belts, guides are necessary to keep the belts themselves from moving laterally also. The proportions of the cones on the rod, and of the two wheels which carry the dial...
Página 91 - Thus it is proved that, in the case of a body acted on by any forces, the motion of the centre of gravity is the same as if...