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" The curve-line which the ball has described, is called in geometry, a parabola; but when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the same line of direction.... "
Conversations on Natural Philosophy: In which the Elements of that Science ... - Страница 64
по Mrs. Marcet (Jane Haldimand) - 1821 - 311 страници
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Conversations on Natural Philosophy: In which the Elements of that Science ...

Mrs. Marcet (Jane Haldimand), Thomas P. Jones - 1826 - 286 страници
...the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the fig. 2. U force of projection, and that of gravity, are in the...exactly balance each other : if therefore that point be supported, the body will not fall. ; Do {you understand this? Emily. I think so; if the parts round...

Library of Useful Knowledge: Natural philosophy, Том 2

1832 - 650 страници
...of direction. We have noticed the centres of magnitude and of motion, but we have not yet explained what is meant by the centre of gravity. It is that point about which all the parts of a body exactly balance each other, in every position of the body ; if,...

The Panorama of Science: Or, a Guide to Knowledge

George Grant - 1849 - 328 страници
...line of direction. We noticed the centres of magnitude and of motion, but we have not as yet explained what is meant by the centre of gravity. It is that point about which all the parts of a body exactly balance each other, in every position of the body ; if...

Lippincott's Medical dictionary

1906 - 1332 страници
...V'vircatpinal. \'i*ual, Vomiting, Winking, and Hoprf, for which see the adjectives. O. or gravity, that point in a body about which all the parts exactly balance one another, so that if that point is supported every part is in equilibrium »nd the whole body is"...

Hawkins' Electrical Dictionary: A Cyclopedia of Words, Terms, Phrases and ...

Nehemiah Hawkins - 1910 - 570 страници
...central point from which branch currents radiate to all parts of the system. Center of Gravity. — That point in a body about which all the parts exactly balance one another, so that the body will remain at rest when supported, though acted upon by gravity: also...

Webster's Elementary-school Dictionary: Abridged from Webster's New ...

Noah Webster - 1914 - 728 страници
...influences, etc. .concentrate, or from which they proceed ; as, areligiouseen/er. — center of gravity, that point in a body about which all the parts exactly balance each other so that, if this point be supported, the body will remain at rest in any petition. — vt 1. To place...

Advanced PE and Sport

John Hill Honeybourne, Michael Hill, Helen Moors - 2004 - 252 страници
...gravity This can be defined as 'an imaginary point representing the weight centre of an object' or 'that point in a body about which all the parts exactly balance each other'. The centre of gravity of a person depends on their anatomical structure, their posture, their current...
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