ABSTRACT
This chapter defines force and acceleration, states Newton's three laws of motion and defines moment of inertia, all demonstrated via practical everyday situations. When an object is pushed or pulled, force is applied to the object. This force is measured in newtons. Newton showed that the motions of objects are governed by the same set of natural laws, by demonstrating the consistency between Kepler's laws of planetary motion and his theory of gravitation. Newton's first law of motion stated as, an object remains in a state of rest, or continues in a state of uniform motion in a straight line, unless it is acted on by an externally applied force. His second law of motion stated as, the acceleration of an object acted upon by an external force is proportional to the force and is in the same direction as the force. His third law of motion stated as, for every force, there is an equal and opposite reacting force.
