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When one force is stronger than other forces on an object, they do affect the motion of an object.

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When one force is stronger than other forces on an object, they do affect the motion of an object.

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When two forces on an object cancel each other out, they do not affect the motion of the object.

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When two forces on an object cancel each other out, they do not affect the motion of the object.

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A force caused by air, acting in the opposite direction of a moving object.

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A force caused by air, acting in the opposite direction of a moving object.

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A force resulting from two objects rubbing against each other.

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A force resulting from two objects rubbing against each other.

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A force that pulls objects down towards the Earth.

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A force that pulls objects down towards the Earth.

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This law of motion states that for every action there is an opposite and equal reaction.

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This law of motion states that for every action there is an opposite and equal reaction.

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This law of motion states that heavier objects need a larger force to make them move.

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This law of motion states that heavier objects need a larger force to make them move.

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This law of motion states that an object’s motion won’t change unless acted upon by a force.

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This law of motion states that an object’s motion won’t change unless acted upon by a force.