Matter and MotionSociety for promoting Christian knowledge, 1876 - 128 стор. |
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Загальні терміни та фрази
angular momentum ARTICLE attraction axis called centimetres centre of mass change of velocity circle configuration and motion constant corresponding deduce defined deflexion depends Descartes described diagram of displacements diagram of velocities distance ditto dynamical earth effect equal and opposite equal masses equilibrium exerted experiment experimental pendulum external agent external forces foot-pounds force acting given instant gramme gravitation heat Hence hodograph intensity of gravity interval Kepler's KEPLER'S THIRD LAW kinetic energy law of motion length magnets mass equal mass-area mass-vector material particle material system measured method moving mutual action Newton observed orbit origin parallel phenomena physical science planet portions of matter position potential energy pound poundals produce quantity rate of acceleration relative represent respect rotation SECOND LAW simple pendulum space straight line stress string THIRD LAW tion torsion balance total acceleration unit of mass vector vibration wire
Популярні уривки
Сторінка 54 - 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.
Сторінка 38 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Сторінка 60 - The total energy of any material system is a quantity which can neither be increased nor diminished by any action between the parts of the system, though it may be transformed into any of the forms of which energy is susceptible...
Сторінка 21 - The difference between one event and another does not depend on the mere difference of the times or the places at which they occur, but only on differences in the nature, configuration, or motion of the bodies concerned.
Сторінка 35 - Every body perseveres in its state of rest or of moving uniformly in a straight line, except in so far as it is made to change that state by external forces.
Сторінка 87 - Rise on the earth, or earth rise on the sun, He from the east his flaming road begin ; Or she from west her silent course advance With inoffensive pace, that spinning sleeps On her soft axle, while she paces even, And bears thee soft with the smooth air along, Solicit not thy thoughts with matters hid ; Leave them to God above, him serve and fear.
Сторінка 59 - act of producing a change of configuration in a system in opposition to a force which resists that change.
Сторінка 114 - ... bodies is proportional to the product of their masses divided by the square of the distance between them.
Сторінка 60 - The doctrine of the conservation of energy is the one generalized statement which is to be found consistent with fact, not in one physical science only, but in all. When once apprehended it furnishes to the physical inquirer a principle on which he may hang every known law relating to physical actions, and by which he may be put in the way to discover the relations of such actions in new branches of science.
Сторінка 20 - All our knowledge, both of time and place, is essentially relative. When a man has acquired the habit of putting words together, without troubling himself to form the thoughts which ought to correspond to them, it is easy for him to frame an antithesis between this relative knowledge and a so-called absolute knowledge, and to point out our ignorance of the absolute position of a point as an instance of the limitation of our faculties.