What is Newton's third law?


Quick Answer

Newton's third law states that for every action there is an equal and opposite reaction. This means that when an object puts a force on another object, the second object exerts the same amount of force against the first object.

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Full Answer

This law applies to all living and nonliving objects, and it occurs in almost every situation. When someone pushes against a wall, the wall pushes back, and if the original force is stronger than what the wall can push back with, the wall will crumble. An aircraft's wing is designed to force air in a downward force, which forces the wing upward, creating lift and giving the aircraft the ability to fly.

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