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Transcript
Chapter 12 Section 2 Newton’s 1st and 2nd Laws of Motion Newton’s First Law: An object at rest remains at rest, and an object in motion remains in motion with the same speed and direction (maintains its velocity) unless it experiences an unbalanced force. Example: A soccer ball resting on the grass remains motionless until a force is applied (a kick). The kicked ball rolls until the force of friction between the ball and the grass acts on the ball and slows it. Newton’s Second Law: The unbalanced force acting on an object equals the object’s mass time its acceleration. (mass must be in kg to put into formulas) Mass and Weight Mass - the measure of the inertia of an object Weight - a measure of the force of gravity acting on an object Notice! the formula is basically Newton’s second law, except weight (W) is substituted for force (F) and acceleration due to gravity (g) is substituted for acceleration (a).
