newton's second law of motion law definition
Sir Isaac Newton first presented his three laws of motion in the Principia Mathematica Philosophiae Naturalis in 1686. His second law defines a force to be equal to the change in momentum with a change in time. Momentum is defined to be the mass m of an object times its velocity V. Let us assume that we have an airplane at a point 0 defined by its location X0 and time t0.