Note 273 — THE CATHOLIC WORLD. VOL. XVIII., No. 108.—MARCH, 1874.[249] (continued 2)

In the New American Cyclopædia, edited in 1863 (v. Mechanics), after the statement that "to overcome all the inertia of a body moving with a certain velocity, or to impress on it at rest such a velocity, the same whole quantity of action must in either case be exerted and expended upon the body," we are given to understand that this quantity is equal to half the product of the mass of the body into the square of the given velocity. From what we have just shown, it is evident that this conclusion is false.