Sir Isaac Newton

 ¡°I do not know what I may appear to the world; but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.¡±

                                                                                                -Isaac Newton

Newton has probably been the most influential scientist in the history of human race. As mentioned earlier, his works are still are the backbones of the modern science and engineering. The most important studies of Newton are the Laws of Motion and Force of Gravity. These two parts are briefly reviewed below. These two parts are needed to solve any problems on inclined planes.

Newton's Three Laws of Motion

Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
For every action there is an equal and opposite reaction.

Force of Gravity

Any two particles in the universe exert attractive forces.     Fg = Gm1m2 / r²

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