Main objective of this lecture is to present on Newton’s Law. It is tutorial based lecture; here explain Newton’s three Law. Newton’s First Law: Law of Inertia; Newton’s Second Law: F = ma and Newton’s Third Law: Action Reaction. Law of Inertia: A body remains at rest or moves in a straight line at a constant speed unless acted upon by a force. Second Law: The Sum of the Forces acting on a body is proportional to the acceleration that the body experiences. Third Law: For every action force there is an equal and opposite reaction force.