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A force between two objects where one object works to slow down or stop the motion of the other object.
Newton's First Law
An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force
Newton's Third Law
for every action, there is an equal and opposite reaction (action/reaction forces)
These foces are always equal and in opposite directions. Newton's Third Law of Physics.
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