18 Of Simple Motion.

And, from Law jth, let B be anyNumber of Pounds, and C any Num-ber of Feet, which B moves in a Se-cond of Time, B x Cxi, 3 will stillbe equal to As the Momentum.

E X A M P L E.

If a Cannon-Ball of 60 Pounds-Weight move at the Rate of 1000Feet in a Second, it will have a Mo-mentum, or Force, equal to 60 x 1000x 1.3^78 thousand Pounds-Weight.

C H A P.