Newton’s First Law of Motion (Law of Inertia): A principle stating that an object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted upon by a net...Newton’s First Law of Motion (Law of Inertia): A principle stating that an object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted upon by a net external force. Newton’s Second Law of Motion: A principle stating that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).
