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### 19 Cards in this Set

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 Newton's first law of motion is also called the law of inertia The statement "to every action there is an equal and opposite reaction" is Newton's Third Law The law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is Newton's Second Law Which of the following best illustrates balanced forces? a crash between a large truck and train forces acting on a object cause the object to accelerate unbalanced Sally sits on a rock. Her weight is an action force. Describe its reaction force/opposite force. The rock reacts by pushing force upwards. Friction is a force that __________ motion between two surfaces that are touching each other. decreases At the same speed, a bowling ball is harder to stop than a soccer ball because the bowling ball has a greater mass force Why is your weight less on the Moon than on Earth, but your mass is the same? Because the earth has more gravitional force The size of gravitational force between two objects depends on their ________ and ___________. mass and weight The law that states that every object maintains constant velocity unless actied on by an unbalanced force is Newton's first law A tug-of-war that results in one team pulling the other across the line is an example of ___________ forces. Balanced and Unbalanced An object in motioin at a constant velocity will change its motion only if a(n) _______________ force acts on it. Unbalanced The law that states that for every action force there is an equal and opposite reaction force is Newton's Law of Motion The ____________ velocity is the highest velocity that will be reached by a falling object. terminal The greatest gravitational force would occur between The Moon and the Earth When the forces acting on an object are __________ the net force is zero. balanced When objects are moved further apart from each other, the force of gravity _____________________. decreases According to Newton's second law of motion, a larger force acting on an object causes a greater ________________ of the object. acceleration