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