 | Leonhard Euler - 1833 - 402 pàgines
...move your hand rapidly through the air. It is evident, then, that in the case of the billiard-table, it is the friction and the resistance of the air which...the motion of the ball must have always continued. The same reasoning is applicable to machines of all kinds, in which the friction which acts on the... | |
 | Leonhard Euler, David Brewster - 1833 - 400 pàgines
...move your hand rapidly through the air. It is evident, then, that in the case of the billiard-table, it is the friction and the resistance of the air which...the motion of the ball must have always continued. The same reasoning is applicable to machine's of all kinds, in which the friction which acts on the... | |
 | Paul Janet - 1867 - 214 pàgines
...this prejudice which yet seems to have existed in Euler's time still, since we find it thus stated by him : " It is alleged by the one, that all bodies...and that it is incorrect to say with Jean Jacques Eousseau that rest is the natural state of matter. If it is so, does it not result that the argument... | |
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It is evident, then, that in the case of the billiard table, it is the friction and the resistance of the air which counteract the motion of the ball, and soon reduce it to a state of rest. Now, these causes are external, and it is easily comprehensible... 