Newton’s Laws of Physics Chapter 2, Section 1 I. Law of Gravitational Force A. Gravity depends on 1) Mass (matter) 2) Distance B. Weight the measure of the gravitational force (measured in Newtons) C. Acceleration Due to Gravity 1) 10 m/s/s (10 m/s2) 2) Free Fall- gravity is the ONLY force acting on an object. 3) Air Resistance (fluid friction)- the force that slows falling objects ON EARTH. II. Newton’s First Law – Law of Inertia A. Inertia is the tendency of an object to resist change in motion. 1) An object at rest wants to stay at rest 2) An object in motion wants to stay in motion 3) Unless acted upon by an unbalanced force III. Newton’s Second Law A. force = mass x acceleration or (f=m x a) or 1 newton of force = 1 kg mass x 1m/s2 B. Forces are measured in newtons. V. Newton’s Third Law A. for every action force, there is an equal and opposite reaction force. II. Definition of Inertia A. the tendency of an object to resist changes in motion. B. the more mass, the more inertia an object has.
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