attract - a force that pulls objects toward each other, balanced forces - forces that are equal in size but opposite in direction. , force - something that causes a change in the motion (speed or direction) of an object, friction - a force between two objects rubbing against each other that resists the movement, gravity - a force that pulls an object down, repel - a force that pushes an object back or away, unbalanced forces - forces that cause a change in the motion of objects, momentum - the property that a moving object has due to its mass or motion, electromagnetism - the force that makes magnets attract or repel each other, interaction - the way things affect one another, such as through gravity or electromagnetism,

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