An essay on the powers and mechanism of nature; : intended, by a deeper analysis of physical principles, to extend, improve, and more firmly establish, the grand superstructure of the Newtonian system. / By Robert Young.
- Young, Robert
- Date:
- M DCC LXXXVIII. [1788]
Licence: Public Domain Mark
Credit: An essay on the powers and mechanism of nature; : intended, by a deeper analysis of physical principles, to extend, improve, and more firmly establish, the grand superstructure of the Newtonian system. / By Robert Young. Source: Wellcome Collection.
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![C ^26 ] fame aftivity may, we have feen, have any quan^ tity of aftiqn, from nothing to its whole quan- tity (i 124),or till the whole active substance is united with the patient which receives its aflion. M Bodies by impulse on others lose their ACTIVITY in proportion TO THE IMPULSE. This is matter of obfervation. Bodies which move in rare mediums move for a longer time, becaufe they impel lefs ; and if they meet any obftacle capable of receiving the whole activity at once, in the impulfe of the body, the body fuddenly lofes its whole aftivity and comes to reft. N Hence, a body by a6ling lofes the aftivity which enabled it to a6l; for only the impulfe of the body is its aftion; its motion is not its a6lion but its aftivity; by impulfe it lofes its motion, that is, by afling it lofes its aHivity, % o * Bodies which suffer impulse acquire ACTIVITY IN proportion TO THE IMPULSE. . This alfo is matter of obfervation. • p The accessory activities ofbodies (g 114) as explained to be thofe which are not proper to bodies, but derived, have been fhowed to be](https://iiif.wellcomecollection.org/image/b2878196x_0154.jp2/full/800%2C/0/default.jpg)
