Given any two of the three variables (force, mass, acceleration) the unknown will be calculated.

Features

• Example input
• Force in lbf or kgf or N
• Mass in lb or kg
• Acceleration in gn or m/sē

Newton, Sir Isaac (1642 - 1727)
English scientist, born in Woolsthorpe, Lincolnshire, England on 25th December 1642.
His three great discoveries were:
That white light could be split into components forming the visible spectrum.
Calculus (debatably invented by him independently of Leibnitz) could be used to investigate the forces of nature in a quantitative way.
To show, by his theory of gravitation (for which Copernicus, Kepler and Galileo had prepared the way) that the universe was regulated by simple mathematical laws.
His vision was set forth in the Philosophiae Naturalis Principia Mathematica of 1687, usually called the Principia.

Newton's laws of motion.

1. Every body continues in its state of rest or uniform motion in a straight line, unless impressed forces act upon it.
   
2. The impressed force is proportional to the change of momentum per unit time which it produces, and the change of momentum takes place in the direction of the straight line along which the force acts.
   
3. Action and reaction are always equal and opposite.