General Results.-Force is a quality of position, definite in magnitude and direction at any point; not constant.
Energy is the name of two different quantities.
1. Energy of motion, half the rate at which a body carries momentum.
2. Energy of position, defined by the statement of the law that the work done in getting from one position to another is the same by whatever path the change of position is made. (William Kingdon Clifford)

General Results.-Force is a quality of position, definite in magnitude and direction at any point; not constant. Energy is the name of two different quantities. 1. Energy of motion, half the rate at which a body carries momentum. 2. Energy of position, defined by the statement of the law that the work done in getting from one position to another is the same by whatever path the change of position is made.

William Kingdon Clifford

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body change constant definite different direction done energy force general getting half law magnitude momentum motion name path point position quality rate statement whatever work

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